I always felt songs like Reincarnated Souls are very true to the series roots too. Bakc in the day, before anyone even knew (or cared) who the composers were, I remember thinking that Bloodlines had much better music than Super Castlevania 4, cause it sounded more like the older games. But hey, that's just me.
I think the core problem here is that the older Vanias (1 to 3) were published on such a primitive piece of hardware that 5 monkeys blowing a flute sounded closer to it than actual music does. I mean listen to:
Castlevania 3 Dracula's Curse - BeginningI have tears in my eyes just listening but... it's a 20 seconds loop. Almost all the old OST suites were about 1 min long. They're glorified ringtones. Even Yamane had to move away from that, try and make it evolve. I think she was facilitated compared to Araujo because she began working on games where the OST wasn't supposed to follow the action (the game structure had not changed, and nobody was expecting anything more than a catchy tune to listen to while sidescrolling from one screen to the next) and because she could factually continue producing music with synth sounds and midi samples - she just made it more complex and gave it her own style, and it felt just right.
Making an orchestrated OST that is faithful to CV's roots would be incredibly hard, in my opinion. Classicvania music is... happy. It's very energetic stuff. When it tries to be "scary", it heavily falls upon using "church sounds" (something Yamane exaggerated with imho, there's only so much you can do with choirs and organs). It works fantastic inside a videogame, but would class with any pretension of "realism" or immersion. It screams "this is a GAME, enjoy!". Which is fantastic in its own way, but I wonder if it could be made work inside a game like LoS.
If anything, it's somewhat criminal that they didn't even attempt at putting in something like this:
Castlevania - Bloody TearsIt would have worked fine, even if just for credits, or as background during a FMV scene. Or during the last fight. Bloody Tears COULD have worked, and they should have made it work.
However, you need to consider something. Imagine hiring a musician you consider having some talent, and then asking him to re-make someone else's music instead of giving it its own spin. I don't know, I guess Araujo deserved his chance, and while overall his work is indeed somewhat disconnected from the serie's roots, some of the suites are amazing. Courtyard is breathtaking, and Gabriel's Theme is the best Belmont theme after Simon's.