Gravewatcher no longer has Unique. I'm sure those of us that wished they could use 2x are a relatively small group, and I'm also sure the 'infinite Coragh' bg is nowhere near as powerful as it once was.... But I imagine the level of annoyance had decreased not one iota.
I believe it still has a bg building limit of 1 though so in essence it still has unique technically... You can still pull off shenanigans with Reanimate on him though.
He can be removed from play however. Blink/Divinity's Touch puts him back in play with his cooldown off and he won't die when his first reanimated target does. Didn't actually check if Gravetend re-triggers when he re-enters play though.