I also requested it in the 'share shortcuts over the network' request. But to have vmix handle 2 program outputs could also be useful.

The 1000$ ATEM can have 2M/E, but in vmix it's only possible by 'cutting' between sources for the external 2 output. Then there is no way to monitor it properly neither, so it's not really a solution, more a hack.

It's something which is high on my list, because it would make several jobs possible, which require outboard gear or hacks right now.

Idealy the second mix should get it's own monitor, eventually replacing the preview one. I know this would make cueing inputs harder, but it would still be an elegant solution.