Adding mantling to the game is OK I guess. My personal objection to it is simply that adding another jump to a jump seems to not add anything particular to game play.
And what makes it more, um, useless to me is the use of mantle marks, those splotches of yellow paint that show you where to mantle. Other games use that too, Horizon:Zero Dawn for example. And showing me where to mantle again makes it a somewhat useless mechanic, I’m not using my brain to say hmmm, this spot looks like I can mantle up, let me try, no, it’s the game is telling me to mantle here, guess I will.
The first game I mantled in, Sniper Elite, did not use marks, you had to figure it out, I liked that better.
Removing mantling marks would present a little more of a challenge.
And of course the mantling marks on the Destroyer are just plain silly. Who in the BL universe is responsible for going to a sleeping Destroyer and splashing paint on its back? Just very silly.