Watch your fingers!
That model looks nice. I imagine that could work very well in 1 hand with a gun in the other (as mentioned above), or as a melee weapon by itself. Or you could do it like the Li'l Ripper in Conquest, where the primary fire launches the saw blades and the alt fire spins them as a much more damaging melee weapon.
As long as its damage is high and it has a large enough range for hitting then it might work in Nexuiz. I like the idea of attacking every 0.1 seconds until it hits something, doing heavy damage, and then delaying for 0.5 before attacking again.
It might also be a very good idea to have a rapid-fire melee weapon slow the target down or very briefly glue the two together. It's just so easy to slip away, even by accident, from a melee attack. Even the attacker will have difficulty keeping a stationary target in his blade if the melee weapon is knocking them back from the damage.
When my computer inevitably explodes and kills me, my cat inherits everything I own. He may be the only one capable of continuing my work.