It pains me to write that, but, if you watch the old one and come back to watch the remake, you'll get angry at how they managed to completely remove the soul, and by that I mean the charisma of the actors, the ambience, the colors and the art style, of the anime and also fail with these horrendous opening and ending songs.

Although, there is one good thing the new one has, it follows strictly, at least as of this comment time, the LN's story and I know that because I am reading, but that's it.