As with Sieg AAS, Eir's AAS can also miss or the opponent can move ever so slightly right before the S, ruining your combo entirely. Really, Eir's meleeing is absolutely horrible. While I wouldn't really say Eir's PvP game is entirely hit and run, a good Eir PvPer will take advantage of range. Going melee-crazy is suicide.
"If someone asks you whether or not you're ticklish, it doesn't matter what you say, they're gonna touch you. If you don't wanna be touched, you gotta say something like, 'I have diarrhea. And yes, I'm very ticklish.'"