The addon has added a few biomes so far 

Cherry forset

Cherry cliffs

Autumn forest

Void ocean

The dunes

Ash Plains

Large stone beach

A few new ores were added 

End version of ores:  Overworld ores that can be found in the end

Ash diamond: ash plains version of diamonds

Aquamarine ‚ ember ‚ and limestone:  they are new stone types 
 

Ruby ore: ruby can be found in the nether and can craft a new battle axe with it

Quartz brick expansion

In vanilla . Quartz bricks don't have any block variant but in this addon they have stairs and slabs.

Cherry wood

With the addition of cherry trees there is also a cherry wood type which have logs stairs slabs and planks.

There will be more coming to this addon when it gets updated so this isn't the final version of it. 

Youtube related things:

You are allowed to play with the addon and don't really have to credit me but if you do it would be greatly appreciated.