this is a really, really good idea. i would LOVE to go to something like this. cc: @Dan_Derks
re: bussing, it just seems more straightforward than grouping to me for some reason. you lose the ability to conveniently "fold" the bus tracks into the group, but something about the mystery of exactly how ableton routes the audio in a group feels too loose to me or something. mostly habit. also helps me to think about grouping/bussing things by mix placement and group/bus effects, rather than a specific instrument or rack grouping.
re: granulators, KT appears to have vanished from the internet and i'm reluctant to put up a link to the original file without Koen Tanghe's permission. he did make a somewhat similar plugin as a paid download but i haven't tried it out. and I didn't get to talk about borderlands, my favorite granulator for the ipad.
re: mixing, the mixing is slowly happening the whole time we're working on something, but i don't let it really bog me down until it feels like all the tracks are there and the song essentially is what it wants to be. that's when all those nit picky things become more obvious, because you're able to start measuring the gap between what the song IS doing and what it WANTS to be doing.
re: fuzz, FuzzPlus 3