I don't think the problem is Europe writing Castlevania. Europe's responsible for some great horror, novels and movies alike. Bram Stoker, Mary Shelley, Joseph Sheridan Le Fanu, John William Polidori, Hammer horror, Mario Bava, Dario Argento(in his early up to the 80s era of movies), among others. Though, I personally wouldn't mind them aiming for THOSE types of horror in atmosphere, whenever the next one is announced. 
And, you know, Europe did Dracula.
Just saying.
Jesus, all this overreaction... get the hell over it. You haven't even seen what their next CV project is... The ONLY thing we have to judge CV Europe on is LoS, and it's not even in-house. Meaning, CV Europe will always be developed by someone else. And we already know MS and Cox are done with CV after LoS.
People, stop being such drama queens when we know NOTHING about Castlevania's direction from here.
Yes; at this point, we're trying too hard to look ahead. If the 
thought of a new CV already has us proclaiming the death of the series, imagine what will happen when the game is actually released. We don't know what will happen yet; until we have more to work with, we should consider holding back, at least for the time being.
For all we know LoS could be the end of this series, which is fine with me if Mercury Steam is the best development team Konami can find.
Now, I wouldn't go that far. I'd prefer to suffer another failed CV than to see the series end.
 
And... what does that mean?