The cling makes it even easier to get out of bounds. If you wall run toward a 90° concave corner and repeatedly jump while holding shift, you can climb indefinitely.
For my part, I say please leave it in! It's acquired late in the game, and I don't think it breaks any of the challenges it's meant for. Breaking out of the barriers that held me in for most of the game is like a cherry on top of... a delicious sundae of exploration and skill mastery? It also fits with the theme of an unsustainable dream world.