One important thing to remember though is they said they are going to rework all the zones in the game down the road. Some are going to drastically change while some will only receive smaller amount of work. At first those invisible walls might still be there but when they rework the areas they may remove those walls and boundaries to a certain extent. Meaning they may make you be able to get up and down cliffs and ledges that are higher but not ones that are too high so they do not need to add a fall damage. As I have said before though we don't know how they plan on implementing the jump yet.