No idea about Power Auras, I only used it briefly before a break from dragon soul- not sure what you could replace it with that would help your rotation. I use Auracle to track vengeance, enrage, block, barrier and all of the class buffs as well as my debuffs on targets. Again not sure if it even helps or not.
Buffs and debuffs- Raven works well but I haven't fully figured it out yet (as far as whitelist, I know there's spell lists but not sure yet how to implement them). I use bars for player buffs and debuffs as well as my CDs. I know it has the functionality because a while back I was using an addon pack called RealUI, which included Raven for certain aspects. Many spells were white/blacklisted from many of the frames.
Never used Macaroon, and BT definitely does not have the same functionality. I know what you mean, I have a Nostromo as well (right now it's in retirement for my new anansi but may come back). Are there any custom conditions you can set for a bar in BT? Such as keeping one of them from paging for the abilities that require no stance? That seems like the worst part of it, aside from just not having enough bars. Jeez. I was less help than I had hoped to be but I hope I helped a little at least.