na, I've tried regular micropulleys in that configuration and they are nowhere near the cocoon friction saver configuration experience.
Think about the profile of the cocoon and its snag resisting, throwline accepting engineering. I'm not saying it is the only way to fly by any means, but more that this is an option you can set from the ground and easily retrieve, that offers further friction benefits from a traditional friction saver. The other bonus of course being that when I want to choke the setup off to get full cocoon benefits, it's go time.
I would really like to explore the concept of combo adjustables when my splicing comes along. 10ft. 16 strand length, Friction ring tight spliced one end, prussik on a cocoon with a retrieval clevice, 6" splice on the other end.
And if you were really ballin you could rock double cocoons.