Thanks for posting about the valve, cruzstyle. It's good to know that the valve does not stick out (down?).
Draining the engine oil on Pathfinder is a pretty easy job, but if you're willing to spend a few more $$ to make the easy job even easier, why not? You should already be paying attention to any kind of fluid leaks on where you park, to visual tire pressure check, etc. anyways, whether you have the valve or not does not change anything.
It's all about personal preference. Posting one's experience/experiment should be (and is) appreciated on the forums. Others can read about it, decide to do the same (or not to do the same), improve upon, etc.