1) ... and why? Doesn't make sense to me. I would use Bartender only with Masque or so. Standard buttons are ugly and doesn't fit in any kind of UI.
2) That is new to me. Have to test it out, 'cause I use the normal version of rActionBarStyler (and not the combined version of Altz UI) and mine does. Same for keybindings.
3) has nothing to do with the fact that outline looks better.