I honestly don't get why you guys say blockland is going to lose purchases.
The general ignorant community out there prefers graphics over gameplay, and the new shadows look lovely. If anything, it would lure in more potential buyers. Losing people that already own the game doesn't change anything, but It may still be considered a loss of creativity. And besides, you're not losing much gameplay anyways.
Mayeb big sparsely-populated empty maps with 2 bases and some guns, but that can EASILY be recreated. (if you're into that kind of boring long drawn-out gameplay)