I still have not ONCE got leaderboards to work on the wii u. This is ridiculous. On the original wii this happened countless times also, but now it's even worse, to the point of NEVER working. It's NOT my internet, as it lets me connect to the rock band store every time and my DL speeds are 20MB/s before using it wirelessly, so it should still be good enough. There is no way I am going to inconveniently do a wired connection where I have to move my modem into a whole different room. This should be working and it's not, like a million other wii versionf eatures over the years.
I've tried resetting, connecting to the store first then going back to play, going to the wii menu and conecting to the online wii store and then returning to RB3, etc... and nothing fixes it.