Many people in the announcement thread thought that it would pave way for Yakuza to be a multiplatform. One person even said it would move 20-30k WiiU's lol.
There's always one or two people who have very unrealistic expectations, it doesn't mean much, most people that follow the MC threads at least knew it wouldn't perform well at all.
Now I agree that in the "not performing well" category, there's sub-categories. And it seems that it's not even going to meet our very low expectations of 10k units moved LTD...
If it actually moved 20k units LTD, which is still a number characteristic of a release not performing very well, I think it would've still been a good sign for future Yakuza titles on the Wii U considering the tiny userbase, no yakuza following and this same title doing 60k on the PS3.