I dont need it to be taking over the screen, I just want something like it back in some form.
Right now Snake is only talking to Miller, so L1 button works fine. But what about when you have multiple contacts? How would you select who you want to call?
Keep L1 as a sort of quick-talk button with voice coming in without a HUD, but put the full-featured Codec on the iDroid. Have the iDroid screen display a traditional codec screen, but have the audio continue even if the iDroid is put away (sort of like the tapes and music).
Good compromise? Perhaps something like this? (Forgive the crude mockup)
While we're at it, the idroid should look more dead-spacey (as one user here put it) like
this earlier mockup I made, which was used as the basis of the codec picture.