What if we designed other Tank's abilities like they were made for WAR?

[Absurdity]

I would say that while true there is some places where DM or HoL can shine over Shake, those are the exception and not the status quo, double dipping on mits is good, but rarely is it required.
There are far more situations and content where those two skills are just flat out dead hotbar space, and Shake absolutely thrives. Anything normal mode, heavy focus on physical, deep dungeons, shake is never a bad skill, while HoL and DM can be made absolutely irrelevant. Felt like shit to get a mech like HH and only being able to contribute a Reprisal.

And its obvious to say that Shake does better in situations where HoL thrives, than HoL does in situations where Shake thrives. Its just an all around more powerful, applicable skill.

Which is partially a problem with Endwalker's fight design. We don't get back-to-back magical aoes where DM or HoL would get more value, instead we get 1 big aoe followed by 30+ seconds of nothing.