D&D 5E Battle Master maneuvers for any class by spending a HD

[Garthanos]

Another idea is having it actually be hp expenditure there is a magic item I recall where you spend 5 hp to gain an effect... this kind of Exertion instead of a HD would then make martial high hitpoint characters even better at maneuvers (which I think would be the desire)

A cost in hit points would create immediate risk out it which HD would not.

 

[Zaukrie]

I'd like more action choices for characters, so something like this makes sense, but I'm not sure what exactly should be available for everyone....

 

[Rabulias]

I would like some more tactical options, too, but it seems like this would make the Martial Adept feat superfluous. And as others have pointed out, a Battlemaster Fighter only knows a few of the maneuvers; giving them to everyone, with more opportunities to use them diminishes the BMF.