5) Are you talking about Flesh Sacrifice? What nerf? It always gave 'only' AP on use.

14) Bedrolls are to big to stack. You only need one anyway, so why pick up others? Weren't you happy to not need pick up trash?

15) Poison explodes if it touches fire. This is just basic mechanic. Set zombies on fire and they make boom everytime you hit them.

22) Vitality gives percentage bonus. Of course it sucks in early game, the difference will be more feelable in the late game, level 20+. Part of the concept. Did you check if the other guy had items, that gave him flat HP? If 101 is 135% the other should only have about 74 HP, if I'm not mistaken.

25) Its probably recommended to have dedicated looter, from whom to share the stuff with others.

26) Shops get new stuff every hour and I think every level up. If there is no good stuff now, check to another time. What stuff will be there is mostly random anyhow. The better merchants are anyway after level 4 and behind the fort.