Never said she was but I think I recall not finding much current roles she was doing (but then it's been a long while since I did that).There's never been any availability problems. She's an active voice actor, and any claims to the contrary has always just been trolling from the usual suspects.
Mizuki from Pazudora barely counts since she was an infrequent gag rival. She did cameo on episode 100 but it was pretty much voiceless only with some grunts that any sound-alike could have made.
All in all, I'm just glad she is still working in the industry as I really appreciate her work on Serena.
Come to think of it, I've like her since Beyblade 4D where she has played Yuuki (that was way before XY by the way)