I think an extended battle queue would work really well with regimen. I haven't actually done them because they were hard to pull off at first, but it's the wait time that really killed them.

If there was an extended queue we could put in a few commands to execute, then quickly select the regimen. Rather then us waiting for everyone to finish selecting we should be able to continue inputing commands. When we feel that everyone is done, or when the signal is given to go, the starter could then just start the regimen and ta da! No waiting.

I think it would be super cool if that when someone picked a regimen the icon of the attack they chose appeared over their head briefly. This would be an indicator to the rest of the party what people are choosing without even the need of communication. Not saying we don't need to communicate, but with individual indicators, we just wouldn't need to.