I think the changes they're making right now are great because they give map makers a hell of a lot more to play with. If you get bored of Vanilla there are plenty of adventure maps out there, like Vechs Super Hostile. They're HARD as hell, but so much fun. They'll only get better with the redstone changes and new machines (hoppers, Droppers etc).

That said, I love it still. Just find it hard to find the time to play it...