Well, not all ideas are for everyone.
and most of this stuff is optional, as in you can ignore all of it without
it changing what you do.
Unlike major balancing of classes (nerfs and such).
If I had to narrow it down to the 2 most logical things.
I would go with the single junk gear buyer in market (who automatically sends it off to the correct NPC sellers.)
and the OPTION to start iconics at lvl 1 all the time.
To me, those are the easiest sells.
(Yea, I know a handful of folks will disagree, like always. Debate is their thing... more power to them.)