Castlevania has been very well adapted in 3D with both N64 games.
No absurd multi-combo like Devil May Cry
No absurd storyline unlike Lament of Shit
No lame level design unlike Curse and Lament of Shit
Good difficulty like all other past Castlevania unlike Curse and Lament of S...(you guess)
So 2D can provide good Castlevania games, and 3D as well !
See series like Metal Gear, Metroid, Zelda, Mario, Ninja Gaiden...they were great in 2
AND ALSO in 3D ! So why Castlevania should be always doomed to stay in 2D
!!??
Really I don't know....ah, yes, it's "that" IGA who runs the franchise...
Go to hell you hairy producer !