I think the idea of requiring taxes being paid is excellent & would benefit the community & help winnow out the shady hosts. If only airbnb would listen to such a good suggestion!
I wasn't able to see you listing (loved the guidebook) but newer pictures couldn't hurt & the feed back from folks using airbnb professional photographers isn't great. When I had my kid the pro take pictures for me he suggested putting them in a file so I could periodically update (change up) my listing. Changing even a few pictures might refresh your listing & bump it up a bit? It sounds from your reviews that your place is a gem in a fab location & you are experienced hosts who take great care of your guests- this is counter intuitive but raising your prices might be reassuring for guests who are afraid that it's too good to be true? The horror stories about fake listings can be off putting.
We are snoozed for the present & just got back from Oahu- a 30 year delayed honeymoon- we house sat for our neighbors' parents who live in Kailua. (they wanted to book with us last year but I told them they were our personal guests & then found out where they lived, yowza!) The arboretums! The beaches! The farmers markets! The chickens! The rainbows! The shave ice! The wine tasting at foodland! Have you ever yearned to visit Berkeley or the bay area? We do have the coffee ( hint hint) Aloha, Sally