But why has the style for the Discussion list become so cramped and small? The 'old' version was genuinely kind of cool, with a comfortable text size and generous use of space. And it was coherent with the rest of the new layout.
Now it looks like they're running away from their own redesign. It's overly busy and hard to read.
Seriously, what's with the tiny text?
Paradoxically, the discussions themselves have also been changed, but in the reverse direction. And again, not in a good way.
The original redesign was great. Comfortable and easy to read.
The new version features so much leading (a.k.a. line-height) that the lines feel like they're separate from one another. The excessive white space undermines the coherency of the text, actually making it harder to read.