Is there any downside at this point to installing WatchOS Beta 2?
And I'm on a developer account that expires in the near future. What will happen to my watch since I'll no longer be a developer but can't roll back watchOS? My iPhone is also on 9 beta 2 and is expiring as well.
I'd be really nervous about installing it now on a dev account that's going to expire. Upgrading from WatchOS beta 1 to beta 2 required installing a new profile, which is only available through the developer portal, so there's no guarantee that you'll be able to move past beta 2 when the dev account expires if it's necessary to install a new profile each time. Additionally, for iOS betas, at least, the betas have an expiration date, so I think there's at least a decent chance that you could wind up with an expired WatchOS beta and be unable to upgrade or downgrade.