English UK is bad in some ways, it doesn't even correct i into I, which bugs the hell out of me. Not prepared to switch to English US, as I'd have more trouble uncorrecting words from the American versions back into UK versions.
However for people saying that the autocorrect and predictive feature is not as good as in WP8 as it was in WP8, this makes sense and has been discussed on here before. WP keyboard learns how you type and what you want predicted and autocorrected over time, having a WP7 device for say 2 years, the keyboard will know you and how you type and so you can type a lot quicker and efficient on it. Then you switch to WP8, this new keyboard has no idea how you type, and so needs to learn. Give it a few more months and hopefully it will have improved.
Speaking of autocorrect, mine comes up with some crazy suggestions sometimes. For example... If I just type 'for' it will come up with a suggestion for the next word to be 'Santa'. This makes no sense as I've never typed this sentence ever before and it doesn't even work as a sentence "for santa" could not be used in a sentence. Apart from that the predictions works really well for me, saying 'Hi' the predictions will be my girlfriend's name and also pet names I use for her. It's really clever.