I think everyone would benefit if CG added a tab that shows all the gear pieces you have in your inventory. With a feature that sorts rarity (ex. Grey, green, blue, purple, yellow / gold) This would make it so much easier for people who are planning to upgrade characters in advance (ex. A legendary event character) the main issue I face is that it takes ages to figure out how much of each gear piece I have when saving for a character I have yet to unlock
To summarize: A tab that shows the amount of each gear piece you have would be wonderful.