You do realise that development of the game is winding down?
GDStash or GDDefiler can be used to remove masteries or powbam made this blank 100 character
https://mega.nz/#!b5901Q5I!8WcbW-TMznKWFjY3koKsHJSGM5bJbTT8qAOBGkyY6cw
I doubt new models will be made since development is winding down and your characters are covered with armour anyway.
This may help with boss loot tables
If the devs wanted more GI features ingame I think they would have added them when they put auto pickup and health bars in the game.
Affinities can be shown either by hovering over the affinity on the lefthand side which will show all constellations for that or by simply using the search function to see which constellations have that particular search item in it.
GD is coming to Xbox, no plans for any other ports atm.