For me one thing that bothers me is that now there are so few threads on one page. The sticky threads chomp almost half of the page and threads get buried, meaning more browsing of several sites. Of course there's the active threads site, but many things seem to so much more "hidden" than before.
That is my experience on a PC anyway, I don't use a smartphone to browse MoS, hardly any sites actually.
Signatures I couldn't care about that much, they possess little to no meaning to me.
