I know Cox is a fan. He wouldn't have bothered at all to even lurk on this very forum if he wasn't a fan and didn't care what fans thought.
Maybe what you're saying is correct - maybe Konami decided to be schizo regarding LoS and wanted as little to do with the previous games as possible, including music, art style, atmosphere, etc. and Cox had his hands tied. If that's the case, then I'll come out and say FUCK YOU KONAMI and give Cox his due.
Regarding future games - I don't give a flying rat's ass if IGA ends up being on any other Castlevania game from this point on, so long as the series continues down a path that made it great in the first place. Not to say I hate IGA, because I don't, but I realize that he's being phased out of the picture by Konami, and that perhaps he hit a wall in terms of creative direction. Maybe not. I don't know. What I do know is that Lords of Shadow is NOT the direction I want my Castlevania to go in, unless that direction ends up swerving back onto the well-beaten road that's been recently paved over with design blacktop.
Now excuse me. I gotta go listen to "uber-effeminate and too girly" Dance of Pales now.