You seem to forget that Valve is dedicated to continuing support for all their games no matter how old. Back a few years ago Valve released an engine update for 1.6 and HL1 that completely broke both games. They fixed the issues in about a month with I think 3 minor updates. This will be the same.
They also changed CS:S's weapons strength and recoil multiple times for the first few months after release before settling with what we have now. And this isn't the first update we have seen like this. They did a minor update with the release of HL2:Ep1. That time didn't screw everything up though.
Give things a little while and everything will be cleared up. You have to release something before all the bugs can be worked out.