Late, but honestly, I would say The Untamed is overrated... though "extremely" might be a little bit of an overstatement. It's by no means a bad show, but compared to other shows out there, I don't think The Untamed really warrants an overall rating that's higher than 9.0 on MDL?
First, the story. I don't understand some modifications they chose to take, such as having Jiang Cheng show a bit of a crush on Wen Qing. I didn't see a lot of point in that. On the flip side though, I can understand the different direction they took with Xue Yang. There were some episodes or moments where it felt a bit stagnant, boring, or a bit confusing or assumes a watcher to have some level of understanding of the source story. I won't say the ending was not happy, but I feel like they could have put more effort into it to bring some more impact. It was satisfying, but not as impactful as it could have been.
I also really don't think some of the actors, main and secondary, truly understood their roles until a good several episodes, really... even for other difficult roles like Lan Wangji. Some actors were great, but others were a bit lackluster in comparison or had to take some episodes to "warm up". Also... the CGI. The only people who could praise that show's CGI are people with painfully low standards. Some were stiff, and others were cringe. There didn't seem to be a lot of research put in handling musical instruments. They didn't even try to synchronize fingers to the BGM. Some settings or props felt a little shabby to me. I understand that this show had low budget, but I don't think that's a reason to just turn a blind eye to the effects of their low budget.
I hope Immortality, a high-budget project, will do better in this regard, since reading the novel, it seems 2ha has a fair amount of... decorative settings, and I know they have generated huge profit from The Untamed. Again, I'm not saying this is a bad show, and I think there are plenty of good things about the show, including character depth, bromantic chemistry, and exploring deep themes, but I think there are too many little things that would "bring down" a show's rating. Do I think this deserves somewhere around an 8.4 or 8.5? Sure, easily. But 9.1? I think there are shows rated in the 8.3 to 8.6 range, Chinese or otherwise, that are on equal standing with The Untamed, in my personal opinion.