While it may seem harsh you have to remember a few things:
Firstly, no-one can do January exams now, and all exams are (at A-Level) is something that essentially ranks you against all the other people sitting that paper, so everyone is in the same situation. Yes, there will be some differences, namely the people who never need to resit won't be affected, the people who get top grades (and the people who don't give a **** about their grades) but these are a minority.
It's better preparation for University, you can't really resit at University - it pretty much has to be done right the first time.
In regards to University offers, I don't think they're going to decrease, however, when it comes to people missing their offer, Universities may be more lenient.
Either way, it shouldn't affect an individual massively, unless you're someone who literally has to sit a paper 3 times to get it right - and if you are, it's because you're not prepared, in which case you'll probably find University hellish.
If you're someone who would've ended up with AAA at A-Level with January exams, you should end up with AAA at A-Level without January exams, and in fact, if you're someone who prepares and makes sure they thoroughly understand everything, you'll actually benefit from the scrapping of January exams, because grade boundaries are going to go down as a result of the scrapping.