I think that there is only so much that anyone can do with exhaust deflection. To make an extension that places the bubbles out of your face could interfere with head movement, equipment snags, and foreign object snags. Its bad enough that you have a hose coming around the side of your head that can catch on rocks, wrecks, or other divers. With an exhaust extension, your snorkel will most likely be the first victim to get in the way. I know that for me personally that my snorkel can get caught up with my inflater hose. Its not hard to imagine a cascading situation when you reach for your inflater and it snags you snorkel, then snags your reg exhaust...etc. etc. I dont see a real viable solution.