Upload & Sell: On
Well, the Oly 15/8 isn't optical perfection, that's for sure. In fact, by modern standards, it's quite bad...but it's sharp in the center at infinity, and has a unique look.
That said, as I've said many times, DxO has no idea what they are doing with regards to lens testing. The Olympus 60mm f/2.8 gets a middling score of like 16, basically because it's f/2.8 and not faster, and because it can only be tested on a 16MP m4/3 camera, rather than a 36MP full frame camera. (some how, their resolution numbers are tremendously dependent on sensor size, regardless of actual detail resolved). Meanwhile, look through all their lens scores, and you'll see ALL of them say that the lens is best when wide open. for EVERY lens. Why? Because they're scoring system DOCKS the lens when you stop down, because it's passing less light. A crappy f/1.2 lens may well rank better than the best f/2.8 lens ever made according to their scale.