if you go here http://www.nexusmods.com/dragonageinquisition/mods/905/? this mod will unlock all specilizations for the class you are using,theres also various cross class files example- human male warrior with storm tree(which has replaced a warrior skill tree etc)there are dozens of various ones for all races, NOTE- you must make sure the unlock specilizations file is before in list in mod manager than the character file,you will get a warning when merging but thats normal so ignore it (warning should say gen_partymember_warrior(or which ever class) is overridden by the character one,this is normal so dont worry) , as for adding upgrade slots its immpossible im afaid,as you can only replace slot types not add new ones or game crashes,ive tried to add upgrade slots to armors/weapons it just crashes hope this helps.