I really don´t think that the achievement / trophy system is something really important. To be frank, it causes a certain division between gamers who play on-line, some kind of segregation, because some people only accept to play with people that have similar achievements.... while that seems great for competitive players, it doesn´t seem the case with Nintendo games, who have a more friendly and casual approach.
As for the other two topics, you got valid points. They really need to work on their update speed. I remember that was annoying on the PS3 and Xbox360 some time ago and they should take a look of what its competitors did wrong in this area and not repeat their mistakes.
The same can be said about online play. Nintendoland is a lot of fun but they really should have put online play on that. The same can be said to NSMBU. On the 3DS online play works just fine for a lot of games, so they know what to do.
Still, it seems that with all the competition the WiiU may find its own audience in the market. It´s just unrealistic to think that it will be a success as Wii was, specially now that the industry is decreasing year after year











