When creating a new segment to easily suppress all contacts who are currently in an enabled journey from receiving a broadcast email from us, I haven't found an efficient way of doing this.
When creating a segment to accomplish this, rather than having to go through a lengthy list of journeys and creating a new criteria for each one, it would be so much more efficient during segment creation to have an option for "In a journey" that allows us to choose "Any Enabled Journey" rather than having to select a ton of individual journeys and setting them each up as their own criteria in the rules.
This journey suppression can also be handled during the Campaign setup process, but then you're still having to sort through a list of all journeys and find and select each journey that is applicable.
To me, it would be more efficient to set up a segment that captures contacts in all enabled journeys and use that as my suppression for broadcast emails.
I'm sure this type of segmenting option will take some substantial processing time for Maropost, BUT is it any more processing time than Maropost having to go through 20 individual rules in a segment, which is the current method.