I like most things about the DR350's design, but one thing I can't get past is the rear swingarm. It's clunky looking and those fins have not aged well. I'm sure the three-piece design was cheaper to manufacture than a welded, boxed aluminum design that can be seen on almost every modern dirt bike, but it's also far more flexible with the open C-channels. Most DR owners agree that the rear swing arm is the DR's biggest weak area.
I have been toying with the idea of swapping it out in favor of something else. Since I am not too concerned about suspension curves (maybe I should be more so) and I have no issues cutting or adding tabs to the frame to support new linkage mounts, my options are broad. So broad in fact that I put #2's swingarm side-by-side against one I have from a CRF450. Granted, the linkage designs are wildly different, but it's eerie to see how similar they are despite their 15 year design gap and different manufacturers.