OK I'll try and answer what I can here as there are quite a few people asking questions and I also struggled to find answers when I was applying so I know how it feels. So...
Counsellor vs. Psychotherapist is a big discussion outside of just this course and I can't really answer that question, I'd recommend researching online into definitions etc and seeing what sits comfortably with you. But counsellor and therapist are pretty interchangeable titles mostly due to popular culture atm, we use both on the course. Psychotherapist it'd about how many years you train is my understanding but don't quote me on that, I'm very beginner right now, there are better people to answer that question.
BACP registered, its more like a union than anything else, you have to fulfil criteria to register as a full member which this course ensures you get. I'm not at that stage yet though, we are all just student members. Counsellor isn't a protected title so it isn't like a badge of now.you can practice, it's just you agreeing to abide by their rules of safe and ethical practice.
Interview wasn't scary and was pretty standard, it felt like they had a specific idea of t right candidates and that wasn't based on formal education, lots of us are retraining. Just prepare to present yourself well and be genuine.
Personally I chose the course for the coaching module initially, but with more research found I aligned myself with personal synthesis. I'd recommend reading into Nash Popovic, he doesn't teach anymore but the course is still heavily influenced by his model. In my experience, know people studying elsewhere, it's a more modern approach. I don't plan in doing any further masters, people are studying use in a lot of ways, it's all personal preference. However, CPD in counselling is important regardless, how.you continue to educate yourself is up to you.
I hope that's answered people's questions enough, I would just recommend doing research on the different approaches which used, what other uni focus on in that regard and how it all aligns with the view of your own future post studies. I'd love to be able to answer the question of "is it right for me?" But unfortunately I can't. I can only say its right for me. But do look into personal synthesis as it may help you make your decision.