one thing that i think would save inventory space is an addition of a suit hud. as in, the varia, gravity, phazon, ped, hazard shield, dark, and light suits should all be seperate upgrades instead of armor pieces. in the suit hud, one can toggle their upgrades and toggle which suit is equipped (suits that arent varia or gravity suits can't be on at the same time)
having the specific suit activated would alter samus's appearence to match that suit. varia and gravity suits can be stacked with the other suit types, but suits from clashing games cannot mix together.
what i'm getting at is, the power suit could be one armor set that can then be changed into the various suits via a hud once that upgrade is collected, it also allows any and all upgrades to be toggle-able.
would also save space on having different power suits of differing functions cluttering the inventory.
also. one thing i'd like to see for the power beam, due to minecrafts nature of mining. would be a mining laser that breaks blocks, with upgrades to allow drilling through harder blocks at a faster rate. i know it isn't in metroid, but for a game like this it gets annoying and breaks immersion to switch to a pickaxe to drill some blocks.
I've been trying to get a way to remove upgrades, but it's a bit buggy ATM. As for the mining beam, most likely not going to happen. However, you can feel free to make it as an addon once I have the API to a place I can feel it is releasable.