Even after figuring out how the variation could potentially lend itself to a faster path, optimizing that path is still an interesting puzzle. While it does kind of make sense why the path is shorter, the fact that a level was deliberately designed with this path in mind is crazy.
The singular "trick" in the level is quite basic and easy to find, but must be monstrously frustrating if you happen to not see it, considering what you need to do to get through this level. Cute gimmick, but ultimately it's just that.