I prefer BR to SC->MB by a lot. I would oppose ditching BR for SC+MB. I read most of the thread. Just posting to add my opinion I guess.

I think a few things need to be fixed for BR:

1 - the "lock out". Let me continue to take other actions as normal. Once someone initiates the actual execution of the BR lock everyone out *then* if you have to until the skills complete (or just no lock out at all).

2 - make it look more flashy. Add really cool distinct graphics to the unique effects. Maybe even separate out the base damage from the additional damage ("Soandso's Fire II hits the Suchandsuch for 400 points of damage! Battle Regimen adds 800 damage!" or something; like the "Magic Burst!" line in XI or something to let people know it was extra effective by a lot).

3 - I haven't found a BR to do yet while just grinding in a melee + mage duo that seemed super worth while. Maybe I just haven't experimented enough.

Just my opinion. Seems like there are strong feelings supporting both approaches.