I've had a few ideas, mainly to nuisances:
(In order of most needed to least)
Analog sticks or dpad still receptive of touch so long as the finger hasn't left the screen- even if the finger moves off the pad itself like android games usually do.
Ability to CLEAR unwanted/unused/incorrect cheats.
Ability to name cheats; use codes that start with any value not just 8 and 3.
Also the ability to have at least 30 cheats
Less crashing? Fpse not closing completely (need to reload ISO) when pressing home button. Fpse has been asking me to load ISO 5x before it loads.
Being able to change cheats w/O game crashing (have to disable them, return to game, go back in to change cheats - then enable them and return to game) or else it crashes/graphical fail.