Aside from looking ugly and making the defroster useless are there any other negative affects of dash warp? I can deal with those two problems but I don't want to ignore the warp and have other bad things happen too.

Visual impairment if it curls THAT much...
Other than that? well... I guess on the extreme side, you could start getting UV fade, and wear/cracking on wires, plastic mounting tabs, and connectors in the dash area, since sunlight can go through the crack, now.


Other than that, its just ugly.