AI will take few updates with the next releases as it is gonna be tested in many ways with lots of feedback. We haven`t got any particular info , yet. But keep watching.
Yes, they create brand new content, among the other brand new systems and stuff. It does take some time, all we know is it will be much better as Joel confirmed with its few, but cool videos. So many videos are gona be uploaded hopefully soon, that hype will make us shake..and who knows what else. Hell yea, they will !
Probably 2017 after late summer
Ah, yes... the one where you hit the dog with a whip to make it your friend, except sometimes he becomes your friend and sometimes he just dies. And then you go smack your cow with a bucket to get milk, but if you do it too much and the cow dies too. I love mods, and I love the modding community, but just because they managed to do something in a mod, doesn't mean they achieved an adequate implementation for including it in the base game. It's not really fair to compare what modders can do to what the game devs can do.
Meh... this doesn't always work out too well, and you may not get a good angle to shoot at zombies. I have had a horde collapse a house on my before. A larger building, yes. But if you go for something relatively small and/or all wooden construction, then you may not survive the night. I build horde towers. 3x3 wide x6 or 7 tall with iron bars at the top so you can shoot down at the zombies, and a ramp leading up to it where you have to jump a gap to get on the tower. The stops most zombies from getting up there. I start it with cobblestone and work up to more solid materials, and add more towers as the game goes on. I usually surround it with barbed wire and/or wooden spikes too. I usually get bored later in the night, when you get the "trickle" near the end, and I get down off my perch to do melee.
