If KTWV were to flip to AC, wouldn't it be very likely to ignore some of the 'hard' classic rock artists (Pat Benatar/Blondie/Eddie Money) that KOST has been playing for ages, without going really soft a la KJOI or KXEZ?
The fact that KOST has lots of sixties-era Motown stuff in their library, and has gotten adventurous enough to play 'American Pie' might be construed to the folks at CBS that KOST's playlist is too wide for 35-44 and 25-54 women to really embrace, in spite of its current ratings and billing numbers, and would be worth going after.
Pretty much, and a flip to AC would make it seem as you are competing against "Whack"...I mean "Jack"
