I am just after the first match after the update and I think that wolves has more HP than before. I may be wrong but I shot one of the wolves three times by sniper rifle and it was still alive... Well, maybe it's just my shooting but if not, please change it

Yep, the recent patch has improved wolf resistance to damage.

I also have an issue with wolves. I do like that they are stronger, but imho there are too many of them! I'm bumping into them at every step, it's easy to run away from them but inside cities it's very annoying. In forests? Ok. In cities? Too many.