It looks like they quite have their hands full trying to stay on the air with their existing facilities.Maybe, maybe not, but It's interesting to note that KCSN 88.5's primary (direct signal) target is the San Fernando Valley, Santa Clarita, and through an on-channel booster, the West Side or simply the western environs of LA, Santa Monica, etc. They have a translator covering Ventura, and another one covering Ojai. What's puzzling is there is no such facility covering greater Thousand Oaks as KCSN's direct signal is blocked by TO's KCLU 88.3. Why there's no translator in that area is a mystery, they probably could be shoe horned in somewhere. (Like buying out the religious LP FM on 107.9 that nobody listens to other than the individual who put it on the air.)
I also notice that David never questions whether there is room in the market for other niche formats, like say all-Iranian, all-Korean, or even the hate-filled KPFK which draws a 0.1 on one of the best signals in the land. That all seems much more niche than the AAA they are playing on KCSN.