Properly-EQed clean, dirty, and acoustic all layered together is really cool. You don't need as much bass as you think. It'll find its way through.
Keyboards are a pain to mix properly with a full band.
In a worst case, use them for accentuation, unless they're the lead instrument. Noise is the enemy, and a lot of noise is generated by the vocal mic, especially when the singer is just sitting there waiting for a cue. We need to get better headphones, since the singer's headphone feed was audible to his mic. Same is true for guitars. While Chad was sitting there waiting to do his solo track, his guitar was feeding all sorts of noise in.