Although I have no particular plans, I think this is a lot like what I would want my topic lists to look like once I get around to really customizing them.
I would probably use a bit stronger colours myself, as in darker. I also second reply count number being a point bigger and suggest that you try to scale avatars just enough to fill the row vertically, or scale everything else down accordingly.
I’m wondering about the latest post - once i have scrolled this page down enough not to see the column headers, I somehow think that the avatars and nicknames are in fact starters’ 
edit: once I clicked the image to 100% zoom, I’d probably shrink the overall font size one point and cut down the padding/margins by a couple of pixels.
edit2: I really would like to eventually see this sort of minimal layout as a selectable alternative to the default layout. well good mate.