Features : 

A lot of chalenging bosses and mobs ( cataclyzme, born in chaos.etc )

Improvement of already existing proffessions

MORE dungeons ( dungeons,Arise,etc)

more village and npcs ( ribbits,Kobolds etc)

A scary ambience  (horror elements, cave dweller)

rpg belike leveling( MOTP-RPG leveling )

And a global overhaul of vanilla( better tree, fresh animations ressource pack, Yung´s dungeons, Quark etc)

Multplayer friendly ( proximity chat )

and a lot more !

Updates : 

Some mods are left for a better performence like:(Distant horizon, MOTP mob leveling, MOTP loot bags) and been replaced for a better Player experience