Haven't chimed in here for many months, but wanted to get out a few thoughts of my experience so far in A19.
Overall, the feel of A19 is really good. I'm playing on all default settings right now, and it feels more difficult than A19. I feel like I'm constantly being swarmed by zombies wherever I go. I couldn't even set up my first stash spot without a steady flow of zombies coming at me.
Loot feels OP. Even though guns aren't in the loot table early on, everything else can be found in abundance. I have unlocked so many schematics, books, found all the good mods, build up a large cache of bullets, and Im only on day 3. Loot needs to be toned down overall during the first 7days.