The PvE legendary armor can be obtained in a minimum of 5 weeks for the whole set. Yet in WvW a whole set would take a minimum of 22 weeks for Triumphant Hero, or even worse, 29 weeks for Mistforged.
All that you'd need to do is either
Take the repeated Diamond chests and give them skirmish tickets like the non-repeated Diamond chests.
Have the entire Skirmish Reward Track loop once you finish the Diamond chests. Keeping the Skirmish Claim Tickets.
As it is right now. There are plenty of WvW players that would like to play more, but don't due to how unrewarding it is once you've finished the weekly Skirmish Reward Track. So rather than continue, they stop for the rest of the week until reset due to not being able to earn those tickets.
Not only would doing either of those two things make WvW much more rewarding to play, and more appealing. It would bring more activity to WvW itself. There's a reason each of the WvW maps are so full at the start of reset and the following day or two.
It isn't difficult to fix or anything either. It could be implemented as a simple hotfix. I just hope that it happens and soon, and not waiting until after the alliance system is fully implemented.