Making it 100% doesn't make Wings too powerful. It only puts it back to the current meta in the shardless environment. Wings + web is rarely even used in competitive PVP. While on arena, a deck that doesn't have a way around a full block shield will suck anyway (Dim Shield says hello).
And of course, SoFr is in need of a nerf in its current state, and seeing that it's the only card affected by 100% web, I don't see how this is a bad idea.