Originally posted by Dimmyzor:

if you are a hardcore gamer and they are casuals, it will annoy you, but you will have to adjust. You may end up carrying them in fights, dodging and moving around like a pro while they struggle with 1 mob and you have to handle 5-6 + an elite or two, buuuut, farm-wise, it's much more efficient.

This is known as "separation of concerns", or "delegating duties".

You send the fighter off to be the meat shield explore and expand influence, while the miner mines and the basekeeper builds, cooks, and keeps the hearth lit. Thus, progress is maintained during the development cycle, followed by all the players coming together for a boss fight, after which the cycle repeats in a new biome.