Qeynos deserves a double xp weekend simply because of the new quest lines. Who cares how many alts you have or the grind.
Its simply fun and far more enjoyable to delete a char and pick up a new to run the new content when your rl simply gets in the way. I highly doubt players who trash double xp weekends refuse to play on those days as a matter of principle.
The game has so much content already grinds really dont matter.