I played a lot on a new seed now and i noticed many small changes. Maybe its just my seed but to generalize i would say the world is now more consitant than before. This means, more buildings in the biomes, "bigger" biomes (not so fragmented like before), more this and that. and it seems they "finished" the mountain biomes. The mountains were playable but there were a lot of problems (boss, too many too small mountains... and so on)..

As i said, maybe its just my new seed i am playing now but i would recommend a fresh seed to start with.