I've numbered your questions so they're easier to answer.
1. You tend to not get support from your lecturers at any university, but lecturers at the LSE are always open to questions. They stick around at the end etc, some even invite students for an hour post-lecture to discuss any points.
The support system here comes from class teachers and your academic advisor. Class teachers are generally quite busy but will always make time for a 1:1 meeting, referred to an office hour. They will generally be available for 1-2 hours a week, every week. You can choose to see them every week, or never. It's up to you. Your academic advisors meet with you once a term to discuss your progress, but you can meet with them as much or as little as you'd like. There's a growing focus on mental health support, but thankfully I know little about this.
Essentially, the support is there if you want it, and it's not particularly difficult to get. Equally, if you don't want any support, you don't have to speak to any academics outside of your termly academic advisor meeting. In meetings with academics, you can go through a particular topic, ask for exam advise, go through an essay to see what went wrong (or right) etc.
Many of LSE's lecturers are incredible, but I'll return to this point later.
2. The social life is not limited. This is a myth. It amazes me that people genuinely believe that in London - one of the busiest, most diverse cities in the world - there's not enough things to do socially. If you like to drink, you can drink. I'd qualify this with a reminder that the halls you live in matter a lot; Passfield, Carr-Saunders, Rosebury and Bankside are generally considered the good ones. They're not 'party halls' in the sense that people are doing stupid **** every night, it's just that people here generally enjoy clubbing etc.
If you want to go an debate for fun, there's a debating society. If you want to play sports, there's sports societies. I'm not entirely sure why I'm writing this, because you know that there are such societies at the LSE; just like every other university in the country.
I've had a great social experience at the LSE thus far. I know others who haven't. If you're willing to go out and speak to people (particularly during freshers'
you'll make friends.
3. Whether or not you go to lectures depends on whether you want to. Theatres are generally full-ish unless there's an essay due in or there was a social event the night before. You can be tactical about going to llectures; if you don't like the particular style of a lecturer, it may be a better use of your time to not attend and do something else instead.
That being said, I would say that the OVERWHELMING MAJORITY of my first year lecturers have been outstanding. Their CVs are incredible, but most importantly they're able to explain things well. I doubt there is much difference between the lectures at the LSE and Oxbridge, but this is speculative. I make this claim because many of our lecturers have worked at Oxbridge before. Same goes for a few of my class teachers.
4. Whether or not you'll find the LSE enjoyable depends largely on whether you want to be pushed. While I've no doubt that many top unis push students to their limits academically, but I think that the LSE is unique in the sense that you'll generally be pushed further outside of your studies too. Extra-curriculars, work exp, volunteering etc is all part of being an LSE student, despite it not necessarily being a part of your degree.
It's enjoyable in the sense that you feel yourself doing a variety of things either at a higher level then you've previously done them, or doing things which you haven't done before. I think this personal growth is something which is encouraged at the LSE.
Another factor to consider is how much of an independent person you are. Studying (law) at the LSE can almost be seen like a guided period of extended study, with a debate session once a week per module (if your class is chatty enough). There's further guidance (as in 1) to help you along the way, but most of the emphasis is on how you can cope on your own.
For me, personally, I've enjoyed being at the LSE. The two most negative aspects of being here for me so far have been some classes (style of teaching, atmosphere) and some of the people. There's this thing about LSE being cliquey, which is true in one sense but false is in the other. If you go up to a group of people speaking a different language than English and try to engage with them, you can't expect them to change what they're doing to suit you. This makes sense when you consider the fact that, at the LSE, some people are far from home and like to feel comfortable in what can be a daunting city. It's untrue in the sense that not everybody is cliquey, and it's very easy to make new friends if you want to. But again, this is like most unis.
I think the thing that sets the LSE apart from other universities is a 'what else?' test. When you tell some people - perhaps an old school mate - you went to a good university, they'll be impressed with that alone. Other people - the people that really matter; employers, other top graduates etc - will say: 'cool, what else did you do?'. I think that LSE students have the potential to do really well in the latter test, and that's what makes the LSE quite an exciting place to be.
TL;DR:
1. There's academic and pastoral support there if you want it, it's not forced on you.
2. The social life at the LSE is good if you want it to be and if you select a good hall.
3. Some people don't go to some lectures some of the time.
4. The LSE is an exciting place to be if you're independent and want to build on all aspects of yourself beyond academics. The academic side is great, but you can and should get more than that here.
Again, I've only been here for a term but I've done a fair bit. This is just my opinion. When I was writing this, I was generally just writing out my thoughts; I hadn't really thought much about my last term.
If you have any other questions, please let me know.