Normal ships:
8 from the stock game pics + 5 from current NS = 13
Fyron seems to need more than these total 13, 4 more to get a total of 17 or can we unify some pic names?
No, they can't be unified. A light destroyer, destroyer and heavvy destroyer are not the same ship, just like light, medium and heavy cruisers are not the same ship.
Bases
3 stock + 1 NS = 4
BTW The Starbase is a stock pic, not neo-standard.
I don't know if the ones Fyron proposes should be here or in a special type.
SpaceFortress would definitely go in here. CargoStation could, or could be a CivilianStation or something.
Fighters:
3 stock + 2 NS = 5
Does Fyron proposes 6 more because he needs 11 pics?
Or only needs 6 in total or 6 + the 3 stock?
Not sure, but I will probably use Small-Medium for Attack Fighter, Interceptor and Heavy Interceptor. Orbital Fighter is supposed to be a fighter that can't move on the strategic map, only in combat. It is smaller than Small Fighter. The Bomber and Heavy Bomber are larger than Large Fighters. They should look a bit different than the other fighters though.
Troops:
3 stock + 1 NS = 4
For Troops, I have Infantry, Light Mechanized, Heavy Mechanized, Small, Medium and Heavy Battle Mechas.

I think that the normal troop pics can be used for the Battle Mechas, and some new pics would be needed for Light and Heavy Mechanized. They can be named Small and Large if you really want, it doesn't matter too much.