I just yesterday got back from a weekend of ADV training in the dirt (BlackSwanMoto, highly recommended! https://blackswanmoto.com/training/
) so I'll add my two cents.
I was the only Vstrom (2016 Wee) in a class with Tigers, R1250GS, F800GS, a couple of Africa Twins, a KTM 1290. We spent a bunch of time on flat dirt, and also time in sand, mud, uphills, downhills, some wacky stuff. I'm not experienced in that milieu by any means.
I was definitely the most ground-clearance challenged of the group. There was general merriment on how regularly they'd hear the "bong" of my skid plate hitting things.
I had a TKC 80 on the front, but a Heidenau K-60 Scout on the back, and I was definitely wishing I had a TKC 80 on the back as well, but I managed.
I felt like I was power-challenged in bunny-hopping over obstacles, but maybe that was just my skill level.
Standing up was rarely comfortable for me (I'm 6'4"), though I seemed to be figuring it out by the end. The instructor suggested that I'd do better in a different cockpit.
I think the smaller 19" front tire compared to the 21" on the other bikes other bikes was a drawback, but not having ridden the others I can't say myself.
Where I did have an advantage was the low seat height. Sitting down and practicing power skids was a blast. And when standing up on the harder stuff when I panicked and needed to sit down I could put out my outriggers and then nothing was going to make me fall over.
My conclusion was that it just barely fits into that class of motorcycles. Off-pavement, definitely. Off-road, only the light stuff.