This is bugging me as well. I was testing out perks to get an idea of what to prioritize when I play for real when stable releases, and both weapons and tools seem weaker now even at endgame. Perfect quality compound bow with mods + all related damage perks + sneak attack would sometimes not kill just a normal zombie playing on the default difficulty. Perfect steel pickaxe + mod + 5/5 Miner 69'er took 4 power hits to break through just stone in the ground. Considering the point investment required that seems a bit weak in both cases.
I'm fine with the number of sleepers I think, but sometimes they are WAY too alert and become active from several rooms away. Some looked like they probably came out of some neat hiding places too but the surprise got kind of ruined by them being alerted too early. Though I'm thinking this may have been because the From The Shadows perk wasn't working possibly? I noticed my sneak meter was still going up for every little thing I did even with the perk maxed. Playing sneakily just didn't seem to be working for me.
On a similar note, the suppressor seems to not work at all on the marksman rifle. Meter spikes to 100 when you shoot. Didn't try it with other weapons yet because I had to call it quits for the night.
Smaller issue: If you have both a helmet with a flashlight and night vision goggles, it doesn't toggle through both anymore and just turns night vision on and off.
Other than those things though, I see an amazing update here once things get ironed out.

Great job overall.