I think you're confusing better with quantity. LCD3's bass seems to have better quality, not quantity. What the LCD2 falls behind is everything sounds congested and like mush in comparison to the LCD3. Maybe that might help with concentrating on vocals. But if you don't like how the LCD2 grips your face, the LCD3's pads are squishier and you might not like them.
Maybe you're right, I was typing too fast and was thinking of quantity not quality. I might actually like the LCD3s more if there was less congestion. The only problem is the big fat price tag on those. I got a pretty good deal on the LCD2.2s brand new at $865 and the HD800 refurbished at $1100. To me, the real worth of the LCD2.2 should be $800-850 for its sonic improvements. The HD800 is worth $1150 -$1250. I really don't want to take a bite at the diminishing returns cake at $1945 on the LCD3