If I'm not mistaken, the first set of gold missions we saw in Legion didn't reward all that much either, and it wasn't until later in the expansion when we began seeing the 1500+ gold bonus for completing missions. Even now, you're still going to struggle on those missions if your champions aren't geared enough to counter the inflated hazards/bosses that come with them.

Either way, with 30+ characters you're still going to be making that much more than just some random person who is only using a few of their characters.