Well I wouldn't mind it if porting it to the Switch will cost very less amount of time for Nintendo
Or
Won't impact the new switch games.
Games that didn't really do well on the Wii U(W101, TMS#FE) will be a very good idea to put on the Switch.
And I think the "play on the go" of Wii u games will be a great selling point. Imagine Bayonetta, 3D World, Xenoblade X on the go! Users who didnt buy it on the Wii u + Double Dippers!
Pocky Lover Boy!