Coming to the thread late, so apologies if this was already addressed and I missed it. But I don't see why domains are being added as a ton of class-specific feats rather than by revising the Divine Disciple* tree. Make it like Archmage, wherein you pick light or dark path at lvl 1 and your domain at lvl 3 with the core enhancements; all of your domain SLAs or other bonuses are granted by the 6/12/18 cores. This keeps domains consistent with other caster abilities. This also addresses complaints that some of the lvl 5/9/14 abilities are too powerful for their level or to be "free" class abilities if (A) they're delayed a few levels and (B) you have to spend APs to acquire them so there's an opportunity cost associated with them. It also makes it easier to implement any domain restrictions if necessary, e.g., if devs wanted to restrict Death Domain to Dark Disciples only or Good Domain to Light Disciples.
And if people say, "Hey, this makes clerics way too powerful compared to FvS and druids!" - well, I agree, so it's a good thing the devs are supposed to buff those classes too, right?
*In the case of War and Healing domains, those should be implemented thru Warpriest and Radiant Servant changes, respectively.