Heehee... Totally.
But it would have been nice to see one of those endings on a game.
That's the thing that kind of annoys me. They tease us and then they can't do it because "it's not right" or whatever they think, I don't know.
You bring up a good point. Games, unlike books or movies, can easily incorporate alternate endings without it feeling contrived or having it break the flow.
Castlevania? In my mind always 
But in a game... I've been thinking but I can't figure it.
When was it?
Maybe it's just my shipper goggles but I got serious ho yay vibes from Juste and Maxim to the point where it felt like Lydie was written in purely as an attempt to avoid following through, like I stated above. XD
Other one (and this one is more obvious, imo) is from the radio drama. Don't see how anyone could read that and not get that vibe from Lyudmil. Only thing that would make him more obvious would be if he tattooed "Please screw me Master Alucard" across his forehead. And again, what happened to Lyudmil?