Thanks again for putting this list together. I agree with most of your annotated suggestions (e.g. the presentation of reputation, smaller images etc.).

I also agree with you that post titles shouldn't take up multiple lines. Within this update, I actually placed some CSS that limits titles to 1 line using a CSS property called 'line-clamp'. Although this property is supported on Chrome, Safari and Opera, it's not supported on Firefox or IE yet http://caniuse.com/#search=-webkit-line-clamp

Filters would be fantastic. Dual panel feel is interesting idea–for it work well and feel snappy, we'll have to keep improving performance.

Anyway, let me follow up with you when we start designing this out.