I really don't think there's any "misunderstanding about the identity of their own game" by the devs. They have access to far, FAR more data points than you and I and they don't make decisions like retiring playlists lightly.
Quick Play is just slayer, which exists in ranked. Team Arena disables half of the game mechanics, so you might as well play Halo 4. Further, the presence of Halo 5 mechanics and a better arsenal of weapons make Core Play distinct from ranked Team Arena. The playlist is literally named "Core Play" because it represents the core aspects of Halo 5 gameplay. To remove it indicates a misunderstanding by the developers about the identity of their own game, which is just sad. It means that we consumers will have to continue dealing with their constant "experimentation" with the game, which drives more people away with each iteration.
Numbers don't lie. People prefer the Quick Play playlist. You can still play objectives in the Team Arena playlist.
It was removed because the population dropped. Quick play consistently had a better population so that was kept.That's unbelievably stupid. Quick Play is literally just slayer. They've effectively removed CTF, Oddball, and Assault from the game. How can they possibly think this is good for the game?
Core play was moved to the rotational list.
Also, how does a low playlist population mean the playlist must be removed? What is lost by keeping it in, and just adding the featured modes? We should have Core Play and Grifball always available. There is absolutely no reason to remove content from the game.
The population wasn't there to support Core play regularly so it was moved to rotational. Same for Grifball. And when those playlists pop up in the rotation, the population in them is higher than if they were left in the lineup.
Again, what makes it necessary to remove playlists at all? And I think it is fairly clear that they misunderstand what their game is supposed to be, considering they removed things like Spartan charge from ranked modes. Before that, they experimented with various ranked settings before deciding to give up on Halo 5's unique game mechanics. They keep trying to change things instead of balancing and building upon what exists. Players complain irrationally about Spartan charge, and developers take the easy way out by removing it, rather than embracing the game's unique mechanics and working to improve them.
It's very frustrating to have a game I enjoy so much constantly torn apart to 'make room' for some random flavor of the month. I want to play the game I bought. I don't want to wait a month to enjoy it, just because the developers don't want to attend players who enjoy low-population game modes.
I've never had to wait more than 10 seconds to get into a game of Core Play, while always-on modes like Warzone Assault or Big Team Battle take at least 5 minutes to find a game. So I'm not sure how low population could possibly be a valid reason for playlist removal. If the developers were at all consistent with their apparent criteria, they'd swap warzone assault for something like warzone turbo.