PvE just got some of the modoptions removed or limited. You can no longer make these modes easier with the provided options, only harder. A bunch of options got removed completely, like grace period time, while others got limited, like wave time or wave size multipliers.

Something that should’ve been done long time ago. People often crank the numbers up without understanding the consequences, often ending up with broken game that leaves everyone involved with bad experience, putting a lot of people away from the modes which are supposed to be challenging. So you cannot do that to PvE gamemodes anymore. If you find the game too hard, lower the Base Difficulty instead, as intended.

More modoption limit tweaks might come in the future.