Consolidate servers from 24 (current) to 9 = 3 tiers-
Rename the servers to eliminate any nostalgic server pride issues.
Open the servers for a short period and let the WvW community heal itself?
Re-Implement Glicko system-
1 up, 1 down has turned out to be a very bad thing. Servers are tanking matches to avoid BG. The immersion is gone - There is no reason to play this "game mode" in many people's eyes. The fights are "fun" and it's the only reason WvW hasn't completely imploded.
Remove Auto Upgrades, Structure Tactics-
Automatic upgrades and structure tactics break the immersion as well. It used to be fun for smaller guilds to invest time and gold in upgrading and defending a tower/ keep/ camp etc. One of the things that appealed to me many years ago was the "Tower defense" element of WvW. All of that is gone now and there's literally no incentive to do anything but "Blob up" and KTrain, or fight during Prime-Time (If you're fortunate enough to be able to play during that time)