For the most part these biomes look really cool and are really well thought out but some of them need to be balanced slightly.
for the most part the blossom grove and the darklands need a slight revision to balance them out.
In my opinion the blossom grove should spawn mobs just as much as the regular biomes considering how large biomes can actually be now.
The darklands should be about as rare as the mushroom biomes (or at least pretty rare) as it would be frustrating running into them as much as swamps.
Other than those two little problems this looks really awesome and I would love to see this in the game.
does the darklands remind anyone of the corrupt lands from terraria? Anyway i have some suggestions, A volcano biome very rare, it erupts every once in a while destroying everything near it. Frozenlands (different to Frost biome) are once beautiful forests frozen because of an ice age, no trees and frozen villages deep beneath the ice with special prizes inside.
Tropical Islands: NO
It looks just like the jungle biome... And the palm trees should generate on any beach that isn't in a snowy biome...
It's just a plain biome with a few trees and this is how are plain biome should become.
Wild west: NOT ORIGINAL
It's just a different colored desert... though the rocky formations are actually nice.
Autumn forest: NOT ORIGINAL
It's just a cross breed between the normal forest and the mushroom biome...
Blossome grove: DUNNO
It'd take to long to write all I'd have to say about this idea...
Frost biome: NOT ORIGINAL
ever heard of the taiga biomes?
Darkland: NOT ORIGINAL
Half way between the nether and the bedrock fog...
In the end most of these biomes add nothing to the game...