Why do you think that only fans of mirror matches and HL are worthy of participating, while fans of anarchy and m200 are not?
So, where is the balance, Panic, and the Christmas tree in the end? :D Why don't they take 8xm8a year after year in OFB? Why take a mirror diamond instead of a normal one, when most people have little experience with it? Why is skirmish specifically chosen from m200 for the pool? If a player has to play on all templates, why not have a draft of 15-17 templates, like in "one for all," instead of forcing everyone to include all sorts of disgusting eights like Jebus and others?
In general, the list of templates can be discussed endlessly; there are no standards here, but a draft is definitely better than mandatory templates.