Something I would enjoy seeing is a sort of tutorial reward armor core, like a “Back to Basics” set themed around the ODST combat harness. Have the core unlocked by playing the tutorial in the academy and then offer up armor pieces and coatings for completing weapon drills.
This would expand both the free content roster in the armor hall, allow a greater degree of variety for new players, and incentivise familiarization with a majority of the weapons in the game.