Almost everyone I know is complaining about them 'being lazy' while Mojang is doing their best to make snapshots every week. Let's appreciate them for a moment.
If they were genuinely lazy, they wouldn't update the game for free at all, they'd charge you for DLC or come out with "Minecraft XI: The Minecrafting" and tempt you to buy it again. Or, y'know, just leave the game alone and rake in the cash.
People don't realize how good they've got it.