Frost fever got buffed which is nice and should increase your focus on keeping that one up especially. I feel like the other changes are relatively minor, a couple cooldown talents were tweaked, but I'll have to play with it a bit before I know what it means for me. Remember, I'm going with more of a PvE and PvP hybrid here (slanting more towards PvP), so my playstyle is probably decently unique.
I don't like the change to Frost Strike, as it was pretty sweet in PvP, but I guess it was probably warranted. PvP saw a ton of changes in this patch, so I really have no clue about how it's going to feel until I've mucked around with it for a month or so. I'm not sure what I'll do with my free respec either, since I may swap around some points and try something different. I'm relatively sure I'll try to stay in the Frost Tree though, because I just enjoy the playstyle I've grown accustomed to.
Anyways, I've copied the pertinent points below. Feel free to consult the full notes elsewhere, I'm just trying to break it up into small chunks and give you an idea of what I'm looking at.