I don't know if this has been brought up before but the parkour system lets you climb on to most stuff that can be considered as a ledge and let's you stand on most things that are solid and not barbed wire. Knowing this and combining it with double jump you can scale some buildings by using the ACs and other ledges. You can actually reach some top floor locations this way that normally would require an elevator since this game apparently considers the elevator as a physical space rather than a teleporter and this is pretty impressive and I assume they did this because they expected people would use parkour to get to the top areas.

What is disappointing is that the two times I've found uses for this mission, the devs never programmed in the interaction. The first is in the gig: fixer merc soldier spy, you can actually climb to the top apartment using parkour but the objective marker doesn't update. You can climb back down the same way but you'll still need to go through the main doors and out to progress the quest and doing it this way doesn't give you the undetected bonus even if you were never detected. You can exit through the elevator and it will give you the complete objectives but you shouldn't have to even have to do that.

The second mission where it really drops the ball is Second Conflict. When you're supposed to go through the window outside so you can go to the elevator and go down that way. But you can actually find a way to drop down safely without dying. However, it turns out you fail the mission if you do this. Based on the context of the mission, you shouldn't fail this and even if I'm wrong about the context, they should have made changed it then to let this be a solution to the mission.

It was fun climbing and finding ways down but it's still disappointing that the devs don't acknowledge this and reward you with at least simply completing the mission properly.