You really need to start considering we'll eventually drop FS9 at some time. We simply can't be keep hindered doing new stuff, if we are tied in capabilities and slowed down in developement by having to support FS9.
We are not even sure at this time if our next scenery (KLAX, most likely) will available for FS9 in the first place and going back working on a 4+ years old project like KDCA, which is an FS9-only product, to enhance it for a product which offers more value to FS9 users, it's not something that makes much sense.
And besides, we always said our only involvement to support former Cloud9 products, is to help users with installation or reactivation, to ensure they'll work with anything we'll release in the future and with any OS upgrades from Microsoft, nothing more than that.