My complaint about WvW is the siege, who thought that 1 hour was enough? This bothers me a lot, honestly, there are people who do not even care about refreshing it and all the siege that someone built is lost in the end. My suggestion is simple, let Keep / Tower refresh the siege automatically or increase the count instead 1 hour. There are players who do not even care about refreshing it and that's a problem. You can save a keep or a tower if people remember to refresh it.
Even worse when your T3 Keep / Tower is captured by the enemy because people didn't want to refresh the siege at all. I just ask you to increase the count or let Keep / Tower refresh it automatically.