Uh, more like Dracula is a descendant of the Belmonts which is completely reversed.
No, because "Belmont" is a surname invented. And the guy who invented it (the first one of the clan) IS, indeed, Count Dracula.
Technically, if you didn't want a Dracula solo storyline... then you didn't want LoS... as it is just that though, it isn't revealed until the end.
LoS it is a prequel to an "origin" story. A new, fresh, beginning for the Castlevania universe. And, in my opinion, it succeed. I like this new take on the hero and this new take on the villain.
I loved this title as a videogame. Much more than others entries of the franchise. And it was pretty obvious for me from the very beggining the "final revelation".
But now, is when the "saga" starts. And at this moment, is when things became really difficult to the writers. How many things will appear from the previous games? How many new stuff?
The first storyline is, obviously, a solo storyline. And the main character is Dracula because the whole game is about the adventures of the character before become Prince of the undead.
Now, there are 1000 years between the ending of LoS and the post-credit scene. And I want games about that period. I want to see Trevor, Simon, Alucard... new versions of our old friends. If the next game is about Dracula in the 2000s fighting Satan, I will not like it. At all.