Tell her that, as Dave and Rob and Bob have proven at various times over the years, freshness is always appreciated by but is by no means a requirement for the position!
Amen to that. Her attention to such things is an indication of why we appreciate her sets so much--she takes care with each one (we can certainly recognize the sets when Dave does, and when he doesn't), so I suppose it's natural she'd be sensitive to burnout. If she needs a break, by all means she should take one, but here's hoping she doesn't throw out the baby with the bath water.
(I'm still curious if there's anyone in Boulder who are as over-the-top about her 10@10s as we are. I know Ginger appreciates our allegiance, but from the point of view of the station and its advertisers, we don't count for squat--we're not likely to be patronizing any of them.)