It has been about year since last post so about to bring it up again as claim buff is definitely the biggest "killer" of WvW.
Passive stat buffs are stupid and have no place in competitive gamemode.
Fighting at friendly camp vs enemy camp is 200 power, 200 precision, 200 toughness, 200 vitality dif.
Damage: 200 power is about 8% damage for power builds but more for minstrel players so it adds up to at least 10%, precision is little less, so lets say 17% total more damage
Survivability: Well 200 vitality is simply 10% more max health for almost all builds, so 10% more survivability, toughness is about the same, so total of 21% more survivability.
Just this stat difference on open field makes it so that there can't exist best guild, roamer or open commander. This removes the reason to play the gamemode for tons of people.
Now imagine you're roaming or blobbing, you beat enemy and then go their camp or tower and try have a nice fight again but there is 17% damage and 21% survivability swing, that is like 2 runesets. Obviously your chance to win the combat drops drastically, no strategy or anything involved. If enemy is competent and don't throw around their skills randomly, the map just ends in a stalemate where each side wins at their corner.
Same difference of 17% damage and 21% survivability is also between having no claim buff and being at enemy keep with presence of the keep, which makes keeps impossible to fight in. This is counter intuitive because the agressor brings something to do for both sides. It also allows people to run useless builds and be outside squad when defending while feeling strong which is big issue for everyone that wants to learn or teach useful builds.
Claim buff wasn't always a thing and it already ruined any competitive scene, whetever it was small scale, guilds, ppting or blobbing. It also makes bandvagoning a necessity if people want to have regular decent, not great because fights will still be semiboring due to stat difference, time in open tags offprime as you can't always rely on enemy to have a group willing to fight you. Time to revive WvW again and remove this disgusting thing.
So what should be done is rework claim buff to something like following, other similar ideas are welcome too:
Doubled with presence of the keep
To make up for lost defending power buff wall/gate health everywhere by 25% and rework shield gen bubbles to not block siege fire and instead pulse damage reduction or something similar. This should buy defenders more time and would make more epic long-term sieges and objective battles.