ok, my suggestion come from my experience, my account is from 2012 and the lists has grown with the years; I tried everything even the reinstallation of the game and the OS; in my case I went straight to empty completely the blocklist( yeah kinda sux I know), and the friendlist is now very minimal( the scroll doesn't appear, before it was like a guild roster). I had constantly disconnections with code 7, and whle playing I had some very unwanted lag spikes; after the optimization I did as explained, its being a week now without a single lag spike and a single disconnection. (I know my ISP is not acting very good, packetloss, but its the sum of all things and something related to the latest patch that pushed to the edge and the problem appears, ofc in my case)