I think the appeal is the need for only one card, and the chance to see so much more nonsense from everyone. Plus, its default is 4 players instead of 2, so there's a social aspect. Mass land destruction is restricted to Bracket 4+, for players who want that kind of cutthroat no-holds-barred play. Targeted land destruction deserves more play everywhere, especially with utility lands and whatnot.
RE: Dismantling and Rebuilding: The Deckbuilder's Dilemma