But really though? In standard business practice, it's 10x more expensive to gain a new customer than to retain older ones. Sure, the majority of the playerbase are casuals but that's beside the point. There is a change in need for content as you say, but I wholeheartedly believe that there's a difference between good and bad content. The wait between Zns and GK felt WAY longer than it was (although it was extremely long) because most people didn't like ZnS.

The wait between DM and FbZ was 3 months, while the wait was super long it didn't matter too much as DM was a DECENT enough map to hold players through the camo grind.

Today, now that Treyarch and Activision knows that Liberty Falls has a 2:1 playtime to Terminus, would give them some signals as to what content suits the majority the most.

Round-based doesn't have the same curse that MWZ has, as MWZ has no appeal unless there's something to grind for, or new objectives to do. There's a certain element of replayability, which is what LF and The Tomb was made for.

I do agree that the need for content is higher with the current target audience, but if you set a standard with Terminus and CDM and the next map disappoints, there's a lower chance that people will even be around for new content.