Interesting post. Something I've never thought about. i will admit, each characters uniqueness is one things that I like about this game and your post speaks to that. I can see how the event cards aren't really capitalizing on that. I do think I've read that they bring the event cards in to enhance underused classes but I think your idea would help that even more. I'm sure there are some card ideas that could help out "mustache" zombies or "leafy" plants that are waiting for release.
more new tribe is good.
for existing tribe, i believe each tribe need 1--2 more "synergy giver", to balance out those upcoming strong event cards (that stand alone).
1 example is imp tribe, imposter and leprechaun have draw card ability, make imp commander less important. But those 2 imps don't give synergy to other imp.
