I know having more bars wouldn't matter to me, it's the same problem of arranging your skills efficiently as we already had in 1.0 It's either going to be pressing R1 quicker, or going the shortcut of R1+button. It's not really any different than pressing up/down to navigate from bar1 to bar2/3/4...

Mind you, I played with gamepad in 1.0 as well, and it was no handicap for me, whether healing or DD (tanking is not really my thing).
I still would not want to go back to the bars.

I guess an option could be fine, but to be honest the game already offers more options than any other I know.