Change the wvw icon at the top of the screen when your team has an outnumbered matchup so people know to get in there! Finally, make a reward at the end of the week for 1st, 2nd, and 3rd that gets scaled by your participation over the week so that people want to win!
Wow, these 2 changes could really really help WvW massively. I like them very much! Those with some tweakings to WvW scoring could save this game mode (that I like very much) from its current state!