Here a few ideas to make Railjack parts (Research, Building) less confusing:
1) Give Sigma armaments the 'Sigma' in their name, currently only the Sigma components have 'Sigma' in their name. Example: change 'Apoc' to 'Sigma Apoc'
2) Give fully maxed parts a visible mark.
3) Make it possible to scrap default (Mk 0) Sigma parts. Make it possible to build default (MK 0) Sigma parts.
4) Currently some Sigma armaments do not know they are Sigma armaments. Example: Apoc does not know, Glazio does know :p
5) Make the tabs for Mk 0, Mk 1, Mk 2, Mk 3, Sigma, Lavan, Vidar, Zetki always visible, not only when parts are owned.
6) Make it possible to purchase slots for Railjack parts from within the Dry Dock and the Player's inventory (for that give Railjack a tab, currently we can't see Railjack parts in our inventory).