There's a reason there was only ever like 2 RTS's ever ported to consoles, and a reason they failed miserably. There's just nothing that you can do to make a joystick, control, aim, and be as accurate as a mouse.
That is so not the reason that console rts's suck. The mouse works well for RTS's because it lets you interact with the GUI while also carrying out it's more obvious functions. This is VERY difficult with a controller. You also have like 50 keys vs the 7 you have on a console. They keyboard is a much more decisive factor in RTS success on PC than the mouse.
I still think tactic based RTS's can work well on consoles compared with resource based RTS's. Full Spectrum Warrior was an absolute blast, and I could see that being extended to something competitive.
As far as FPS's are concerned, right analogue isn't horrible, but the left analogue stick kicks the ass of wasd as far as movement is concerned. Head shots are more difficult, but you can easily hit and track the body and you have a huge range of movement. It dictates a different playstyle.
Input does not dictate competitiveness, game design does. Is chess more or less competitive than golf or soccer or rugby? Or better, chess and checkers have almost identical inputs, but checkers is immeasurably less competitive than chess.