I’m very happy to see some Screenhero features making their way into Slack. That said, after using Screenhero regularly for a couple of years, I’m very disappointed in how it was implemented in Slack.
In terms of UX, the green border around the shared screen is distracting and the control panel just gets in the way. I much preferred the simple red logo in menu bar for control.
I also found the quality of the share to be worse than what I’m used to with Screenhero. The compression and lag were much more noticeable.