It would be pretty astounding if it was FAQ'd to only allow switching to a single hit. And frankly, would reflect poorly on the game's current rules developers.
Heck, it seems the whole point of moving to this fancy and varied attack dice model is exactly to allow for situations like this, giving abilities like Screed and Warlord varying levels are effectiveness depending on which kind of attack dice are being rolled at the time.
Indeed.
I also don't see any balance issues.
Warlord: Clearly most useful in the blue (VSDii) version, since you'll be rolling more accuracy. You COULD add H9 turbos to make Warlord even more effective, turning a single hit into a double one, but that's another 8 points. With the H9 you could go VSDi I suppose, to save some points, but in my experience the difference between short and medium range is significant for a VSD. If you sink so many points into something, it should do some good, right? Plus there will be times when you need those accuracy icons and can't swap. So it's not OP, not by a long shot.
