No. It would mean that Nintendo is allowing us to have options since they plan on us all already having a 3DS on hand.
Instead of me rushing out last minute to buy a 2nd, 3rd or 4th controller, my friends can bring their 3DS to fill in the multi-player needs of the night.
If I already sprung for extra controllers, or my friends also have a WiiU, then they can bring their controller.
Just seems like more options to me.
It just seems like Miyamoto threw out that comment about using a 3DS as an extra uMote, but Nintendo hadn't actually planned on anybody being concerned about more than 1 uMote per system, so now they needed to find a way to create parity between the uMote and the 3DS.
It also happen to be very convenient that 3rd parties were probably already asking for a 2nd analog stick, so now they get to knock out 2 birds with 1 stone. 1 rather large stone, but still a pretty cheap stone.