This topic has already been discussed over at math.stackexchange, and it might be reasonable that we discuss it here, too. The most important changes in the reputation thresholds are, in my opinion: You need
2000 instead of 1000 rep to edit other people's posts;
3000 instead of 500 rep to vote to close, reopen, or migrate any questions (huge change);
10000 instead of 2000 rep to delete closed questions and to access moderation tools (nobody here has 10000 rep so far).
Personally, I'm not really having problems with this, although I've already used the priviledge of editing a post. There are enough users with 3000+ rep, so the first two points might be irrelevant. I'm just a bit concerned about the last one.