Just to let you know , there are many things that are wrong with the new terrain generation algorithm. First , I do not know if it is intended or not but the border of the map is a lot less smoother than it was before. It literally cuts the biomes in half instead of ending the biome slowly and putting water. Second , extreme hills or other hilly variants of certain biomes do not get a lot higher than y=100 , and are usually very flat. Finally , you do not get the same terrain while generating the exact same map with the exact same seed multiple times. I will put screenshots of 2 exact same locations generated using the exact same seed , but with enormous differences in terrain generation.
There are probably more things that needs to be improved but these are the 3 main issues for me.