Boring is a bit of a stretch, but they could certainly do with a bit more acting and story...
I mean, not that it's always so great in JAV, lol, but you know what I mean.
I feel like she's put in too many of the same situations:
You're hot, here's the scene, now begin the sex.
To be fair, though, there have been more than a few shining moments of hers, like SNIS-048: Living Together With Shion, or one of my all-time favorites, SNIS-147: The Sexy Channel.
When she's having sex, she is FAR from boring, that much I know!