I typically have my strong resource base already established before I build a FIX and would build an MCV. So what is your proposed fix? I think that multiple build queues are simply inappropriate for C&C. It was not in the original, and doesn't really make much sense to add, and I don't think it adds much to gameplay (while it certainly detracts). I think it risks turning the game into a basewalker's paradise (picking up an MCV in a crate virtually guarantees a match will follow this course). Instead of multiple queues, I think instead there should be production speed-up. That way you still get the advantage, but without the crazy bursts of sudden construction, powered by conyards on the other side of the map.