I don't really see what the need for one is, but I'd rather have more upgrades for the cyclops that add cool stuff like a rear or second dock for the seamoth, and better lights.
I would love to have a second docking Bay upgrade, I always end up picking the prawn over the seamoth but I miss using the seamoth to explore in the late game.
This would be awesome for late game, and would add another use for diamonds. Should require some ion cubes and maybe kyanite if they want to make it endgame only.