A couple of points:
Firstly, I generally have more kit than keys on my person, so being able to seperate the two, whilst handy, would not be essential.
Secondly, due to pocket wear and tear from large bulky pocket gear, I have (more or less) kept my EDC "emergency" carry seperate from my keys. In otherwords I have spread the load between pockets..
The system of quick release also has me worried. I have never seen or used the products, but I can imagine a senario where you "release" your gear and find you've ended up with nothing but an unwanted set of keys in your hand.
Just a few thoughts....