At the beginning I would like to say that this idea is taken from upgrades you can buy in Fractals of the Mists. I thought that adding this option would improve the feeling of progression in WvW. Hardcore players will appreciate the opportunity to enjoy better WVW benefits. So let's get started.
Account WvW Augmentations are upgrades that can be purchased from Skirmish Supervisor that can be found in every World versus World map. These upgrades will affect all characters within the World versus World map. There are four tiers to each upgrade. Each upgrade stacks with the previous level.
Permanently Increase WvW Experience and Reward Track gain by 5%.
Permanently gain 25% chance for bonus karma from fallen foes. [Drip of Liquid Karma(150)]
Permanently gain +3% [Damage to] and -3% [Damage taken from] Guards, Lords, and Supervisors. Gain 25% more WvW Experience for killing Guards, Lords, and Supervisors.
Permanently gain 1 extra pip bonus towards Skirmish reward track progress per tick. Completion of WvW Reward Track provides an additional reward in the form of 1 Box of WvW Supplies.
The proposed costs and buffs are of course to be discussed. As for the idea itself, I consider it a development of progress in wvw. Buffs are not exaggerated and do not give the player an advantage over others, only increase the progress of the prizes. The cost of improvements must be high to reward players who spend most of their time in this game mode.