I don't remember the fanservice in Code Geass... was it that bad? I know GitS's Makoto design was purposely made to be seductive due to the nature of the character.
It's not that there was huge amounts of fan service, but it was at inappropriate moments. Like she's in the cockpit mid fight. It'd be a serious moment in the heat of battle, then you'd get a shot of her from behind. Why? It's weird because I like Kallen as a character. Just didn't like the situations she got herself in at times.
As for Motoko, it wasn't that bad. When a person is dressed revealingly and they are meant to be a seductive character, it's not a problem. That's not fanservice. There's meaning as to why they are dressed. If it's revealing for the sake of it, then it's fanservice. It's just when as the beginning she was giving police reports and debriefs in her leotard where it seemed out of place. Perfectly fine when she was tricking the guys in the odd club/bar