I have had this experience with a few bikes over the years as well, there certainly is no one size fits all, which in my opinion is a good thing and why we have such great options to choose from these days, and I am sure more to come. Two of the items, as you noted, are very rider specific, positioning and buffeting, and at 5'7" and 160 pounds the bike fits pretty good and no buffeting at all (same fit almost as my 890R after a handlebar change). My 2023 DX I just got last week has about the proper static sag and I can get my rider sag damn close, almost as good as I was my 890R stock (perfect after improvement). I loved that 890, but I did send the suspension out to SP here in AZ and it was a world of difference. I am sure the DX will end up there or at the ride shop eventually as well, it has some harsh spots thru the stroke for sure, and yes, more work is needed in the rear thank the front. Like you said, that matters a lot for the riding we will do on these things. For me the jury is still out, way too new here to tell, but I have the exact opposite experience in the canyons so far at 600 miles, the KTM was so vague and scary under heavy acceleration until I added the Scotts stabilizer, then it was on rails as you said. I had been stranded a few times on that bike, immobilizer failure, valves were at 0 tolerance at 8000 miles so the bike would not start (200 mile tow home out of the desert, no Bueno) and the constant cold starting trouble that was just draining batteries all the time made me uneasy. So I traded it after 14K miles. When that bike was going it was great, but it had some moments I just wasn't sure I would make it home at times. Which to be fair, only once did I need the tow and that could happen to any bike for sure, even this DX. I would buy another KTM for sure, I have a 2022 Husky TE150i so definitely I don't hate the Austrians or hold a grudge, LOL.
Oddly I find the DX to 'feel' lighter on the trail than the KTM (which it certainly is not physically lighter), but again, I think a lot of that 'feel' stuff is subjective and will depend on so many factors like height, weight, luggage, terrain, level of exhaustion for the day, physical fitness and experience, etc. I think we are all winners so long as these companies remain competitive with each other and we can get out there and have a great time beating the crap out of these machines and ourselves! We are all blessed to even be having these discussions about what we like better about these $20K bikes, we are all very fortunate indeed.
Hope to see you all out there on whatever bike you like! If anyone is passing thru AZ look me up and lets go ride!