As an FR fan I have to say its likely that Im going to pass on Complete Divine
The PRC
The ENTROPOMANCER might seem like a likely candiate for House Karnok in Chessenta but theyve already got there own PrC in LOD (and HK are not a huge organisation)
The Divine World
WHAT HAPPENS AFTER YOU DIE, This is not alot of use, as the Afterlife is completely different in the FR, we have the False and Faithless, unbelievers are not sent to the there Alignment plane (as they no longer exist in the FR cosmology)
Domains and Spells
A few of the Domains are useful
The Madness domain could probably go to Cyric (all though its debatable whether its applicable any more as hes no longer mad)
Mind Domain probably a good one for Illesine and maybe Oghma
Mysticism domain: judging by the spells this could go to any deity
Oracle domain: Savas
Pact domain: Tyr/ Torm and maybe Ilmater
Pestilience: Talona & Yurtus
Purification: Lathander
Summoner Domain: Mystra and Azuth
Weather Domain: none really, Talos has the Storm Domain and its a much better fit then Weather, The Winter domain found in Dungeon magazine is a better choice for Auril, which leaves us with Umberlee and there arent any Water/Ocean type spells in the Weather Domain.
All up its not looking good