They seem to have this attitude that if they devote a Nintendo Direct to a game, that's the only publicity push it needs.
The obvious problem is that its generally Nintendo fans that watch them, so they're only really advertising to those who already have a Wii U or were going to get one anyway.
This is indicative of a larger problem; they are aiming almost exclusively at their existing fanbase and not making the effort to bring in new gamers, which they desperately need.
What they need to do is aggressively advertise the Wii U's Q3-4 games to the mainstream public. REAL advertising; prime time commercials, sponsorships, billboards, a Tropical Freeze slurpee promotion, (come on, that one writes itself :p) stuff like that. Make sure that people other than the already-committed fans who watch Nintendo Direct know about their games.
Directs are a great way to inform the fanbase, but they don't have the reach to replace traditional advertising.
