No. The Suns have so much talent at the other postions that any decent point would look like an all-star based on all the easy assists passed to open players on the perimiter.
That's not to say that Nash doesn't to a great job and wasn't a good addition, but the Suns need a solid backup point and who ever it is doesn't have to be a great player, just a solid dribbler with good court sense.
I mean, with targets like Stoudemire and Marion and Richardson all you really need is a a guy to get them the ball, wouldn't even need to score much.