Cyborg was much easier to play compared to Rookie. He has a decent self defensive item that stuns enemies that are right on you, and blocks their attacks(Rookie's flashbang is way better though). He also has significantly more HP to work with, allowing you to take way more damage.
His auto aim tracking ability is pretty neat, and given the right circumstances he can clear half the room in seconds with automatic weapons with that ability.
I don't find much use out of having 3 weapon slots, other than the fact that you can save ammo. It makes weapon swapping much more difficult. But that might be due to me being a controller player...