I like the idea of adding an outside air hose to the air intake on the router.
I have a Wynn filter, but without paddles. Grizzly makes one with the paddles, wish I'd known about it. I tap the filter from the outside, and blow air back through the outside of the filter. Guess I could add to that removing the can after that and using a shop vac to remove leftover sawdust. I wear a mask whenever doing any kind of cleanup.
I found a much lower cost solution to the overhead air cleaner, made by WEN. Same stats as the JET, but a little smaller. Same filters, same hp motor, got two for about $100 (on sale) through WalMart online-delivered free to the local store. Speed and timer settings same as Jet. Mount near a wall so you get a circular air flow. I run it regularly. Pix below.
I didn't see any indicator that you have a separator installed in your system. I'd definitely put that in place. Pix below is the one I have. Fiber 30 gallon drum with metal top, two fittings as shown from Rockler. I only use that brand since 4 inches is not the same from all manufacturers.
System isn't allowing me to upload pictures. Will post them later.