1.) GuildLeve Chains: If a particular Leve sends you to a camp, upon completion of that Leve an NPC at that camp then offers you a related Leve that sends you to a Hamlet (or outpost or cave, etc.) which upon completion starts another Leve that sends you further into the wilderness, then eventually to another Aetherite Camp in a new zone. It may be too linear for some tastes but it would give the illusion of progress.

2.) GuildLeve Bonus Runs: If you complete a 1 Star Leve and qualify for the Early Completion Bonus, an NPC at the camp is so impressed that he/she offers you another run of the same Leve but at 2 Star level. If you get the Early Completion Bonus again, you get offered a 3 star repeat, all the way up to 5 stars. You would be allowed to group up with others to continue the chain.
Imagine peeps at camps shouting for groups instead of just soloing in silence.