Obsidian didn't seem that hard to get (stone barrel, lava and running water also can net you that) , oh and the diamond dolly is a thing in the pack, would be easy to pick up a few spawners and just make a easy grinder setup, get alot of the kill quest done quick, well quick once you have 3 diamond, 5 iron and wood.
Fishing is awesome, I fish for fish, fish for plastic, fish for cow, chicken and blaze Ghast jockeys, leather, how many animals, and the name tags to name the animals so they don't despawn,
I've had alot of chickens disappear, I'm guessing they de spawn because, nothing can kill them because they are in a closed safe area, is this intended?
oh and I didn't see the growth pattern of garden plants explained, best I can tell is that they follow a growth pattern similar to vanilla minecraft mushrooms, this would be a cool thing to explain (if it isn't already), I'm leaning on Garden plants because I really don't like agricraft, not saying its a bad mod but the mechanics of seed splicing, I can do it but its a kind of boring that puts me to sleep sitting straight up and so I avoid agricraft unless a important quest requires it.