After playing well over 100hrs of Zelda with the pro controller, I gave portable mode a try for a couple of hours this morning and it's pretty terrible from an ergonomic standpoint. Not quite 3ds bad, but it isn't a whole lot better.
This is kind of why I didn't buy a pro controller yet, so I can actually get used to the Joycons. After spending an extensive time with Zelda I actually feel super comfortable with them.
Did you enjoy the Wii U gamepad? How does it compare? Im probably one of the rare here but i really enjoy the Wii U gamepad. I got no problem playing Zelda on wii u with it.
I think the buttons on the Joycons are smaller but I ended up enjoying it so much more than the Wii U gamepad because of the matte finish instead of the glossy one.