I was a hiking and backpacking guide in Denali for three years and went on a lot of trips. I used a DuoMid.
I had my fair share of beautiful weather (highs in the 60s-70s, partly cloudy to sunny, little to no rain). On those days, I didn't generally care what my shelter was—pretty much any UL shelter, including a small tarp, would have been fine. But I ended more days than not soaking wet in 45-55F temps with gusty wind. And when that was the case, I wanted a shelter that was:
1) Quick to put up so I could get out of the nastiness ASAP and into warm, dry clothes.
2) Solid in high wind so I didn't have to stress about my shelter failing.
3) Fully enclosed so I could seal out the nastiness and keep my warm, dry gear warm and dry.
4) Roomy so I could spread out my wet gear, cook, and fully relax.
The DuoMid was a 5/5 for everything but wind. It was very good in wind, a 4/5, but not so bomber as to feel unassailable. Something less flappy would have made me feel better at times. I've since moved to a TrailStar, which I find as good in the other areas and much better in wind.
I never found bugs to be enough of a problem that I needed a bug shelter. For whatever reason, not many bugs came into my shelter, and those that did ended up in the peak.