Being one that enjoys Campaign, with the exception of the, as I call them, Angry Retard NM's AI (Many of them are repetitive and rather annoying, more so than challenging), I often get messed up on one thing. Union. One way or another I get AoE'd, aggroed, buffed, etc. trying to join Union, so why not do one of these:
1. Eliminate the need to join upon getting tags, allow people to join a Union in a town, since most people seem to huddle up in Adder alone, you COULD just eliminate the different unions and simply have 1 union. Most seem to join Adder because it is the first choice and the joining process is very slow with a pointless "Join a Union, Yes or No" menu that takes long enough to load that you could get the dreaded "Event Skipped."
2. Keep things as they are, but don't allow hate, aggro, or dmg from campaign mobs for 5-10 seconds unless an action is taken upon a Campaign mob.
I don't exclusively do Campaign for treasure, more for the XP to re-cap when I've died, or to gain my level when I'm close but left PT for various reasons. Still, the Union treasures can be nice and I kinda feel naked doing Campaign without Union.