I think that this is the best looking attempt so far. It's clear, it jumps out, and is released at the right time (discontinuation of D20STL). It's about the same size as the D20 logo, so it should be easy to replace the D20 logo. A couple of publishers could even mass produce this as stickers so their older stock can be relabeled (if/when
WotC demands it to be removed from old stock).
I really hope this gets adopted by more, if not all, publishers.