Not really innovative, infact some people would see sinking the bridge as cheating, but it serves me well in this instance!!
I did that with a Kahler Flyer on a Squier Strat in 1986! Not that I'm claiming to have invented the technique or anything.
I think the increased angle over the rollers helps sustain a bit, at least when the bar's not in use. But that was my problem with the Kahler in general - because the cam part of the bridge raises but the saddles stay put, you reach a point where there's almost no string pressure on the saddles and the guitar just dies. That apart, I think it's a wonderful, beautifully engineered design.
I never owned one, but the Washburn Wonderbar looked an interesting design - it also had roller saddles but there was a second set of rollers pushing
down on the strings behind the saddles. Big bulky thing though.