1) Define alt friendly. Alt friendly to me implies that you can reasonably catch up on an alt without having to do all previous content, but still required to do some of it to be ready.
2) Whether it is a grind or not is irrelevant to me.
3) No.
4) How much is a ton?
5) For the most part, it is. Only a few fights are wipe parties.
6) Nope.
7 and 8) REMOVE THINGS I DON'T LIKE BECAUSE I WANT ONE SINGLE SOURCE OF CHARACTER PROGRESS!
9) Impossible and it never was.
10) And this seems slightly contrary to points 7 and 8.