I see "Choice is an illusion" as the weakest argument here along with "It would be hard to do" when we have the some of the most talented devs in the world working on this game.

The only time choice would truly be seen as an illusion would be for the players taking on the hardest content in the game (coils/extremes) and need that best build to progress. My suggestion would change little for them as they would play the best build as they are told, however the rest of us can make our own decisions and enjoy unique playstyles.

Typically a decent player wouldn't feel compelled to kick someone until it is obvious they are failing. At that point one would consider another setup. Don't want to get kicked from PUGs? Make some friends who share similar playstyle interests.