Back in the day when you could name your own game names, you had SPAM but you also had the ability to put something like "30+ players or boot".

Well, why not add options to the game hosting so that you can check what the min level is required/suggested, have an option to check that indicates whether you are Farming, Running (power leveling) or Doing Full Map. Something like that.

This way you know what you are getting into when you join. It might be it a bit less frustrating on those folks that want to do the whole map only to find that this is only a Mynas run.

I'm sure there are other options as well.

Yes, this was suggested a long time ago back when you used to be able to name your own game but there were too many old threads for me to try and pick which one to revive.