I would suggest to change the like/dislike buttons, because right at this moment, they look like "go to the top of the page" buttons. I certainly mistook them for that, until someone gave me a like and I wondered where that came from.
And I don't see many people making use of them. My suspicion is that most simply don't know what they are. The icon should be clearer in my opinion. If you don't want the "thumbs up" thing, then maybe at least add a text that says "I like this" or "thank you!" or something similar.
Besides... on the top of every thread, there are still the old "stars", but they seem greyed out at the moment and I can't click them and rate threads. Is this deliberately?