I've been doing a lot of side-by-side play testing of #Amethyst and #Wisp... An impression that I had of the latter was that the interface felt too crowded somehow.
I couldn't exactly figure it out until I took these screenshots... As it turns out, Amethyst had a white-space indent on the left side of each feed (highlighted).
Somehow that makes it feel less "crowded" and easier to read quickly, for me at least...