I started to play it yesterday and it REALLY DOES feel like a true Igavania, the controls, the mechanics, the music (obviously because the composer is the same) the ambiance and the story so far. For me it feels kind of a sequel to Order of Ecclesia since the glyph system is very similar to the crystals system in this game, but combined with the soul system from the Castlevania Sorrow games.
The only thing that still feels a bit awkward are the cinematics. Sometimes are anticlimactic or look poorly optimized, the character animations are e bit stiff or broken in some frames, but I've only seen the first two so my impressions could change when I finish the game.
I just beat the second Boss, the game has been good so far and I'm pretty excited to complete it at 100%, something tells me that it will be huge as the previous Igarashi style games.