like both ideas, and i think life really needs something that can deal damage and has more survivability than a dragon, and i believe the word is branch, because a twig is usually smaller than 3 inches across. but branch punch doesnt sound like it fits, how about smash? or just plain ol punch?
and technicly, bee's and flies are air creatures, they just cost life to summon, and i think the cost for the elite bee's ability should not go up, as the bee itself is stonger.
i somehow doubt these will ever be implemented, but it would be great if they could, and the abilities would be almost the same, just edit the tree's ability so it loses 99 hp (or just making it die? if losing the HP is possible it would be easier, and it usually doesn't overlap with overkill), and deals a different amount of damage, then combine that with the procrastination effect (with a different icon) and bingo you've got a bee, but the hard part would be getting the artwork, and getting the base tree code in the first place