Dunno what you mean by quick release. Where did you get the idea? You still have to thread the strings through the bridge when you top load. Nothing quick about it. It's actually a hassle to get the ball ends to sit right in the slot on the new high mass MIA bridge. The new design is a pain to get the string right without twisting.
You just have to stick the ball ends through, not pull the entire string through. I call that a quick release.