Yes the hardcore fans should be pleased to have their games promised on a much earlier date than it really could be completed on... every time.
If they would have originally announced the game to be released in Feb or later, we wouldn't have this problem. For the 3rd or 4th time: Its not about the game being completed in perfect form or being released before its finished. Its about Nintendo setting dates they can never meet... ever.
But if you know that Nintendo is bad at setting release dates then why bother listening to these release dates? All you're doing is ruining the actual fun you'll have with the game when its finally released.