I've played SF4, Tekken DR, SC4, and others for mostly single player, with a little bit of online play and got plenty of time out of them...like 30+ hours. They offer a decent amount of content, high production values, stages, unlockables, etc. etc. I don't play MP much, but I just like to play fighting games.
A shmup has one set of stages that takes an hour or less to run through with credits, but some basic time attack and extra difficulties, which are good, but are hardly considered "added value" in this day and age. There might be some other ships with different weapon types involved, but you basically have one small chunk of game with some ornaments hanging from it.
I'm not complaining about that, but I feel like the "fan tax" is bullshit in the U.S. Drop the price and get that shit next to the impulse buy candy at the grocery store.