They should just be scaled up.

I'm sorry but they can cry about "But it's designed for level 50" - But, to be frank, what the developers intend for the hunts and how the community actually approaches it are 2 entirely different things, and they seem pretty insistent in continuing to shape it around that, as opposed to how the community has adopted it.

Either that or treat it like a FATE and have everyone downscale.

Don't really see any reason whatsoever to maintain this current implementation.