Loadout Slots, It's been said once, and another time, and a few more after that. We need more.

[XkrXDragoon]

Do we NEED more slots? Well no, not really, but it'd be nice to have at-least a slot for each frame, not mention the fact that some people might like to have each frame set up with multiple styles/loadouts, especially with the new options for looks and mod setups.

But what about data storage on de's end?!

Whelp, we've got just as many vehicle slots as we have warframe loadout slots. Which means enough data storage is already allocated for all of us to have, double the slots that we do, saved and ready to go. But none of us use it....cause why would you set up 30 something vehicle slots when theres....5 archwings

The suggestion here, is to get rid of vehicle loadout slots, and let us use them for warframe loadout slots instead. (2 loadout slots per level up, 40 purchasable)
Transition the vehicle loadout page to work similarly to the companion loadout page.
Which has the added QOL of having your chosen archwing, heavy weapon, k-drive, and so on, being tied to your warframe loadout slot.
Rather than having to select 2 loadouts in a weird menu jangle when you go on mission (if you even bother)

[Hokibukisa]

We can buy more loadouts per frame, and weapon.

I think the mission puzzle piece is universal forma. (Excluding umbral)

Could even have it so that it costs 6 forma and 10 platinum to build.

Ultimately it would be a convenience, so put whatever you want on the rainbow forma build/buy requirements, even platinum only if needed. But imo that is the missing piece.