The topic about lack of new features was well discussed months ago here: No monthly blog update since November. Are the team ok?.
Dynalist developers took the decision to focus on Obsidian, and I took mine, not to wait any longer and move to Workflowy, and use their classy mirror functionality.
Months later I don’t regret it. I loved Dynalist and I’m still following their announcements, as much as I’m interested on outliners and productivity software.