I never understood the whole "ADD JUMPING BECAUSE LEDGES ARE STUPID" thing.

You don't want a jump mechanic. You just don't want them in the way. The game was designed from inception not to included jumping. The team in charge of map creation knew this. Any ledge, hill, or bump in the terrain which is impassible is not just there because the designer is bad. It is there to prevent you from just walking over it.

With this in mind if they add jumping and feed this information to the map team all you're doing is forcing them to make the ledges BIGGER. You can't magically parkour through Griddy any faster then before. Now instead we'll have an annoying animation that people will spam for the sake of spamming, then get those same people whining on the forums about how Jumping is useless because they still can't get over what was never intended to be gotten over in the first place.