New biomes:
- Mesa, which is made entirely of clay. Also has red sand.
 - Mega taiga: 2x2 birch trees with podzol, which acts vaguely like mycelium.
 - Ice plains spikes: ice plains with packed ice stalagmites.
 - Savannah: flat like plains but also has acacia trees.
 - Roofed forest: almost completely topped with leaves, trees and giant mushrooms are up close to each other. Has mostly dark oak wood.
 - Birch forest
 - Sunflower plains: like plains, but can have sunflowers.
 - Forest flower: a forest with the new flower types.
 - Deep ocean: really deep ocean.
 - Extreme hills+: like extreme hills, with birch trees.
 - Snowless taigas.
 - M-variants are much more mountainous.
 - Hills-variants are hilly.
 - Plateau-variants are hilly but with flat tops.
 
Oceans are smaller (thank God!)
New blocks and items:
- Acacia and dark oak wood added. Slight texture change to all.
 - Lots of new flowers! Still got dandelions. Red poppies replace roses. Added blue orchids, allium, azure bluet, tulips which have many colors, oxeye daisy, double-height sunflowers, double-height lilacs, double-height rose bushes, double-height peony. They are mainly used for dyes.
 - Stained glass and pane counterparts. This is particularly awesome.
 - Packed ice: lacks most features of regular ice, but you can still slide on them.
 - Red sand: acts like regular sand, but you can't make sandstone from it.
 - Portals can be much bigger.
 - In addition to regular fish there is now salmon, which always gives a tuxedo cat, clownfish which always gives a siamese cat and is a poor food source, and pufferfish which is used in a potion of water breathing, gives you a ginger cat, and will make you sick as heck.
 - Fishing has been changed a bit so now you get junk and treasure sometimes.
 
There are other changes no doubt but I'm not terribly interested in them.