There's only like, two instances where I can think of an animal I'd swap out in favor of a monkey:
- Swap out the siamang in the Conservation pack for a gibbon. Then give the gibbon slot to a species of monkey from SA.
- Swap out the sifaka for another SA monkey from the Zookeeper pack (but even then, I don't mind the sifaka and think it's a solid addition).
But other than that? Any animal they might have swapped out for a monkey would have left a glaring gap that people would be saying we are missing currently. There's an obvious gap in the roster but I don't think it's as egregious as some people are making it out to be. When you look at it holistically, the vast majority of DLC rosters make a lot of logical sense for the broader PZ community.
The structure and frequency of the DLC packs is mostly to blame. Not the rosters themselves. And from an objective "resources available" perspective this was
always going to be a problem. It was just a matter as to what animals it would be a problem with.