That would require redoing Fighter from ground and maybe do an extra interaction with weapon maneuvers that Larian already implemented or messing with the feat economy for Fighters.
But they are too busy reinventing the wheel for stuff that require no change.
The main problem is the "cooler fighter" roll is already taken in various flavors by rangers barbs and pallys
You can only change them so much before they stop being the class you payed the license to use
Have you seen...all of EA, but particularly stuff that's come out on the past week??? They've changed a TON of stuff. Not to mention that Larian already made significant revisions to the Ranger (which people, including me, are mostly happy about).
Also, they can change all Fighters in a very specific way that doesn't involve creating new features or stepping on other classes' toes: give all fighters the Battlemaster maneuvers. Essentially, fold BM into the base fighter. This would drastically improve fighters' number of options in combat.
