To say nothing of its actual systems, its kind of pointless to continue to praise this and that about what XI did right if those things done right didn't actually lead to change within the genre. At best, I think we could say that the upcoming EQ may have taken a bit of its job system from XI and Rift, but that's about it (off the top of my head). I'd be curious, though, to see just how many compiled things people can come up with that XI actually changed the game on, given that they took 90% of their concepts from EQ and the remaining 10% from SE archives.