If I had to build an electronic system to deliver 1/24 second flash I'd probably use high-output LEDs. For short pulses they can do more than the steady-state output. In fact, if the rolling shutter is a fixed design feature of Red, then I bet there's soon going to be a market for such "slow flash" units.
On the other hand, maybe I'm worrying too much. I guess the flash in music videos is there just to "look cool" and if the intended audience thinks that fractional-frame flashes are just as cool (or better) than the old look, why bother fixing it.
Come to think of it, I guess you could create flash-frames just as easily in post.