Exactly. Each Tier will increase the skill requirement until even wearing BiS you won't be able to just go "derp a derp Imma smashing my 1-2-3-4 combo again again, derp! Derp!" Eventually people will either have to accept that they need to get better or will go "this game is impossible" (despite thousands of other people having no issues).
And why didn't they increase the reward at the same time, just like all the other HM?