Another point for Landfall: Drownyard Temple allows you to trigger landfall on your opponent's turn
without using a fetch land or casting a spell. Pretty minor.
Works with Smokestack (and isn't made redundant with Crucible). Not sure if that's good enough, but it's something.
In the fight of Crucible vs Drownyard Temple, I think I want Crucible almost every time. Rather than list all the times I'd want Crucible more, I'll stick to when I think Drownyard is better.
* My opponent counters Crucible
* My opponent destroys or exiles Crucible
* I want to get the land out of the graveyard at Instant speed (say, in response to having it exiled by Deathrite)
* Wasteland is no longer in my deck (Surgical extraction?)