Let's make it clear. Interface in FOnline is horrible in many ways - including PvP combat in real-time.
Combat in F1 and F2 was turn-based so interface that was made there was working well. In your turn you had time to plan your moves, select all things you wanted, open inventory, scroll list, aim at any part of body you would like to etc etc. Now in real-time in FOnline players don't have really much time to open inventory each time they want to use superstimpaks or open big-ass aiming window and then click on tiny button. It's well known that because of that some players are using ways to cheat with packets or programs that make manipulaiting in their inventory or aiming faster and easier. Staff of FOnline says that it's cheating and it's bad but I don't know if there was at least one player that was banned for that.
What most of players, that play in real time PvP, suggest is making shortcuts and other tweaks that would eleminate benefits of other players from cheating and in result all players would have equal chances.