Ah, I didn't know where you were going with this one, but now I see. I've been out of the dp look for a couple of months now (busy is good!) and haven't seen the latest testing charts.
Yuck. You're right, the previous dp charts were extremely instructive - especially when comparing the nuances of center to edge/focal length/aperture variations. For instance, I compared the Sigma 70-200 f2.8 OS extensively against the Canon EF 70-200 f2.8 IS, and could literally "see" the complex nature of the Sigma's CA and center-to-edge sharpness. Also, the places where it roundly trounced the Canon - really depending on focal length and aperture - showed me it was in places where I would use the lens.
DXO and I go way back - and I've never really agreed with a lot of their criteria. To me, the proof is in the pudding - and their software is extremely lacking when it comes to lens correction. I've also disagreed with their methodology for sensor testing - but I suppose a lot of folks far more clever than I believe it to be sound. Personally, as soon as I start taking photos with the lens off the camera I'll start to buy into their logic. And this doesn't come from a bitter Canon user. I'm a bitter Canon user for different reasons!
I was happy to see that dp was moving back to lens testing, but ambivalent about the DXO part of it. Now I see a good reason why!
In the meantime, yes! I'm excited about what Sigma is doing and where they're going with their lenses. I think that it's going to cause the big 2 to consider their own products moving forward.