This isn't something that a lot of people will be affected by, I understand that. But on the odd occasion I'm not near my PC- like this entire Summer- I'll be using my Laptop. It's able to run star trek online fine... as long as I use my assigned hotkey to hide every element of the UI during heated battles.
This includes a lot of stuff that I would rather keep like the action bar.
So, I propose adding "Hide" buttons to every UI element like the EXP bar and weapons list (in space) already have, I'm not entirely sure why it isn't already an existing option. I'm sure a lot of people have the occasional problem with lag now and again, or just want to get rid of something they find redundant and/ or distracting.