Resolve said it was tuned better than Arya, and so much so that when he first listened to them back to back he thought the Ananda was supposed to be the better one(confused by the pricing), until he had an extended listen closely to details, Crinacle ranks them as one of his best tuned headphones, S- with only 4 ranked clearly above it at S and 1 ranked S+, Zeos said they are one of the best buys in headphones "I think these are probably the one of the better buys and headphones that you can get, period."
I am not sure why you are calling out the openness or emptiness (also known as separation) of the soundstage and their sound because of how open they are as "thinness"... Again what I said "Really hate to be a headphone hater but I think some people missed the point of the Sundara and Ananda." still applies here, I think you still don't get it, counting that as a "bad" thing is as silly as calling out the HD 6 series for being intimate and smooth, that is literally the nature of the headphone. No idea what the soundstage height thing is, but I know with virtually every headphone I use if the cup isn't positioned in certain way on my ear it can sound like the soundstage is weirdly high/low or in odd positions... I would recommend if you get a listen to it again play with positioning and slider height.
Anyway to me, the Sundara almost sounded like real life but with not enough detail, resolution, and soundstage too small for me to get lost, the Ananda fixed all of those for me. If I listen to it long enough I sometimes legit forget I am hearing sound from headphones and get up to do something, take them off and am genuinely shocked the music/sound stopped. Literally nothing else gets even close to that except Sundara especially having the perfect timbre to recreate peoples voices to a scary realistic degree.... You are entitled to your own opinion, just know, I didn't even like the Sundara. Sundara to me was boring, some of your gripes, I had with the Sundara, but to me the Ananda is amazing, even better than the LCD-2F and LCD-X as far as a revelation...
Now, as a headphone to listen to for music or gaming, Ananda is NOT my first choice or even my taste, but for movies, especially dramas(I want a LOT of kdramas) with lots of talking it is perfect... At the end of the day it is recognized by a lot of people as not only being very good, but also very good bang for your buck, and this is considering it's detail and resolution over the Sundara isn't all that amazing, nor is the soundstage benefit and the FR is very much generally the same. So it's safe to say, especially factoring in comments about the tuning, from not just from professional reviewers in general, but from two of the most methodic, respectable, serious reviewers, who have lots of experience in high end headphones, and having used and reviewed many many ones, that most people have not had a chance to use along with all the others, that the tuning is excellent... and again I stress excellent for what the headphone is made for, I get it's not your cup of tea. But the tuning is excellent, and it is very neutral, and the most natural sounding headphone me, and that many others have ever used, for recreating sound, especially voices, as indistinguishable as possible from real life.