Nintendo's inability to make system transfers seamless and painless is unparalleled. no other company in the history of.. well... games.. has made backwards compatibility so difficult.
why is it that Wii software can't utilize the gamepad for controls or display? as much as I'd like full backwards compatibility, it's really just an additional layer of abstraction on top of the Wii hardware. It couldn't have been that hard to do. Just because they're used to doing the "compatibility mode" thing doesn't mean that's the right user experience cause it's not.
And here's the most bizarre aspect, despite the Wii mode being unable to access the gamepad, or the additional flash memory of the WiiU hardware, it can somehow display using the HDMI port, which was not on the original Wii. This tells me that they were just too lazy to implement ways to display on anything besides the original Multi-AV out and the HDMI port.
Again, the Wii mode should not care what the method of display is, it sends a frame to the output and whether that's HDMI, component over the Multi-AV out, or the gamepad shouldn't matter. In addition to that, using the gamepad to control Wii VC games should have been simple as well. All the software is expecting is inputs from some controller, disguising the gamepad button presses as classic controller button presses should not be a difficult task.
Nintendo's "solution" to Wii backwards compatibility is a travesty and a wasted opportunity to make Wii titles on Wii U more accessible and readily available. (They could even offer WiiWare and Wii VC titles on the eShop if they did it correctly, instead they screwed things up as usual...)