Action Bars

Is there an option to increase the number of buttons per bar? Looks like 12 is the maximum for the bottom bars. I don't remember having this same restriction in the classic version of Tukui. I would prefer not to use the side bars as it would clutter my screen (have my damage and threat meter on the sides). Believe it or not, but I have almost all of my 36 buttons filled and I'm not even level 70 yet.

Thanks for all that you guys do.