I like most of A21. In terms of water (i play sibgle player): ive never had an issue that was major, but i do loot a lot and dont build "a single permanent mega fortress" filled with dew collectors and workstations, i just run around and make sure i have a POI nearby reinforced enough to live through the horde and for crafting "enough". I do play a slow game though, not min/maxing so "the struggle" for something is always there. I personally think the magazine stuff is "not as fun as gun parts were" but i do like how it has "fixed" tool and weapon progression so it feels better and also better than just dumping perk points into things to advance tools/weapons.
i also dont really "play a specific type" of game like "stealth" or "fists only" or "intelligence build this time!". I just put points into whatever i want. Some games i just want to build and farm for awhile, then i go "hih, probably should spend a week looting as im short of supplies. Mmmmm looks like im going to he using my knife, club , and shovel this time".
Ive heard a lot of complaints about "debuff stacking too much" and "vehicle damage too much" but (as a long time player) i like that those things were made kore difficult. I dont mind dying IF i know i decided to take on a POI or a horde (and debuffing fast when multi hit) and i wasn't really "ready" for it, but the "stealth is broken" complaints seem to have more weight as ive been trying to he quiet (because low health, early game and all i have is a wet napkin wrapped around a stick and aome grass pants) and boom every zed wakes up and charges me. BUT "running away" almost always keeps me alive, so maybe thats the purpose: spice things up and get you killed if you're too cocky and never run away/prep? Like "you cannot always rely on stealth so, be prepared!"