Getting tired of Van Gaal's favouritism. What has Januzaj done to earn a starting place over Herrera? He's basically there just based on him being some sort of a "second striker" instead of an "advanced midfielder." Even more annoyingly, he's always the one subbed out, because it's clear to everyone he's not quite having an impact on the game.
And don't get me started on undroppable captains.
Exactly, you just answered your own question. Its just a matter of which qualities he wants from his nr. 10. For now he obviously wants us to play with a second striker who can interchange with the CF. It became apparent against Tottenham(I think it was) that Herrera can't do that, at times he found himself being the tip of our attack and the move just died because he doesn't have the pace or dribbling to capitalise when we're on the break. Besides I Think that Januzaj has grown little by little with every game so far and he's someone that we need to be persistent with, he's good enough right now to start against 70%+ of the PL teams but another season like the last would seriously damage his development.