MoF did have good soundtracks. But so did LoS. You know what the problem was, though? It was not a level based soundtrack unlike the older games, it was more scene/event based such as whether you were by yourself or in combat. In LoS, if you took your time and explore the game slowly, you would listen to some nice ambient strings and choir throughout the game, but if you were all about speed running and beating the game, then you came to the combat phase more frequently and hear loud brass and trumpet bombardment and its soundtracks like those which people may find it generic because music like that has been played in fantasy movies and games a lot of times. But in MoF, there weren't a lot of enemy spawns and therefore the game played more environmental music which a lot if VGM producers DO TRY to make it pleasant to listen to. It's unfortunate that most the LoS's soundtrack was unreleased and the ones they did put on the disks were boss battles and combat music. Most probably didn't even search for the rips on YouTube where there were lots of unreleased pleasent soundtrack. Which is why, I defend Oscar Aroujo's soundtrack, because I listened to most of them thoroughly. He is a great composer. And as for Classic soundtracks, I didn't here anybody complain about that in AoS, DoS, OoE (Adding NES disks doesn't count) and especially CoD which literally had none. Most of us don't want classic soundtrack. Face it, you just want good music because if there wasn't this whole reboot hype, IGA would still have been making the games and there wouldn't be a lot of complaining about the music.
As for the games and its future I have to say, what's wrong with Castlevania taking the next step, this is not me trying to defend Mercurysteam. But Castlevania after SotN has been experimental the whole time, being a hit or miss. Please, do realize that there's not a lot you can do with Vampires. Try a new direction and you will end up making twilight. Which was a new take on Vampires but it failed horribly. Vampires always have the same theme. Blood, Midnight, immortality, bats, etc. and there isn't much that can be done with them. Which is why LoS was at least trying to expand their territories in Castlevania's theme at least. Castlevania deserves much more than this. The ideas are great but it has had poor executions in some games. As a fan, I want Castlevania to be an epic series but honestly and realistically speaking though, some things do need to be changed in order for it to do so.