I have read the comments on the youtube, and one comment really stuck out to me that I think explains why it is so divisive, mainly relating to the philosophy of creating new arrangements of video game music.
The comment, let me find it:
So this is probably the largest difference in the way I process game music vs how I think others do, mainly in the general public who do not produce music actively (casual listeners). This isn't a right vs. wrong issue, this is really more of a perception and philosophy difference/disagreement. This is healthy and should happen in any community that isn't toxic.
For the most part, game music for me is divorced from the game it comes from. I have been told on some of my previous work (back before I had an internet presence) that "this doesn't sound like a battle theme" or similar comments. At one point I did a stripper tempo swing version of Megalovania from Undertale. It went really slow, just to play up the sleaze. For the most part, it was *destroyed* by people who heard it, almost like I committed blasphemy.
OCR is full of creative arrangements, but the whole line is accessibility. For the most part, if you did a calm, ending theme as an upbeat 80s synthwave track, nobody would really complain about it because they can relate to the style. Something much more classically oriented that's out of left field like this doesn't really give much to relate to (unless you listen to a lot of music in this style). It is kind of like listening to some avant-garde jazz and not enjoying it because you don't really listen to a lot of it and don't really "get" its nuance (I am like this with most of the more distant subgenres of metal, for example).
When I do arrangements of game music, almost always I'm trying to do one of two things, and you can hear this from the things posted on this site.
1. Have some fun with a tune I really enjoy or remember fondly, combined with writing some fun stuff to play (Cazador, Journey Never Ends, unrelated but everything I do for Materia Collective falls under this category). This usually ends up being very relatable for most people.
2. Experiment and really push myself in something I'm not familiar with, or explore a style of music I enjoy (Protoman, Reflecting Pool, As Blew the Winds). These are mainly used to develop my skills, and I really don't give much consideration to the audience or making it an way that it means anything outside of itself. This is where the disagreement lies.
So in the most sincere way possible, I REALLY don't care that the Mario fanbase wouldn't listen to this and be reminded of Mario. That wasn't the point. That wasn't even close to the point.