Alphastream
Hero
Well, we will see if the folks at Wizards manage surprise us and turn the Flumpf into a usable, engaging, unique monster.
I think it was in one of the monster posts that James Wyatt mentioned the possibility that the Flumph could be an anti-aberrant, able to sense other aberrants and working against them. That has some potential.
Personally, to me the Flumph has always been a bit like gamers. Wronged, maligned, and laughed at. But, actually, kind of cool.