my main concern with Legends gameplay was the vertical enemy placements causing the enemies to constantly respawn as you moved up and down the screen. i didn't mind the soul system, but i find it hard to forgive them for not adding a bonus mode after beating the game in which you got to actually use those sub-weapons.
the idea that Sonia is the ancestor to an offshoot of the Belmont clan is one I hadn't considered before and has its merits. just have to figure out now why Sonia had the VK and why it didn't go to her descendants. unless it was "different" ancestral whip like the Hunter Whip (Circle of the Moon) or Holy Whip (Kabuchi no Tsuisoukyoku novel). maybe one of those whips would not have a problem with a woman wielding it?
as far as who her child and Alucard's child was, what if it was Hector?!?