Yep. There is an official Ubisoft Nintendo ID that I can't remember for the life of me that tries to update their current efforts to make their servers not broken, but it's mostly "We'll patch it soon!" then a patch comes out, then it's more "we'll patch the patch soon!".
OK. So online on the Wii U just doesn't work. It doesn't work. I've spent a good 40-50 minutes trying to get a game going with a friend. It just didn't happen. We each happened to find a room with the same guy in, but were unable to join each other. We tried joining each others game. Then inviting each other to our games. Then we tried searching for a public room. Again, nothing. It's completely broken.
They've at least acknowledged it's their problem rather than Nintendo, but that's of little use. I can usually get a Spies Vs Mercs game going, but if you want co-op it just doesn't seem to work, which is a problem when some of the content in the game is online only. New patch is incoming, but as I say so far they've not helped.
Oh for goodness sake, I've caught my scrotum in my zip again - Margaret Thatcher, 1986