World XP from other activities.
Unfortunately 2 out of the 3 ideas you mentioned could be farmed and abused. You’d see players popping siege right next to a supply depot and build until it’s empty, just to get the XP (this also places useless siege and hitting siege limit). Players would buy upgrades at towers/keeps when they shouldn’t be; when under attack or buying services when a second worker should be ordered, or buying a Waypoint before other critical upgrades.
Ressurecting players could be farmed, but Anet has already stated that there is a cooldown on players recently killed.
In general, I approve of alternate mechanics to earn WXP, especially when it comes to rewarding players who defend… but it needs to be implemented so not to break other game mechanics.
Jessamine [SNOW]
Gandara
Gandara