Not really. If you've got your setup down pretty good you won't need to purge really. If you do get harsh smoke that you want to purge, just hand the hose to the person you like least.
A KM/Syrian will have a better draw than a Mya also. I've replaced the aluminum stem tube in mine with a wider bore stainless steel tube and it still has a noticeable more restrictive pull than my AF medium solid despite it only being 1/32" less in diameter. It's mainly because of the amount of connections/joints in it so it can be broken down into it's individual parts, which is great for portability and cleaning in a sink.