I think it’s best to stick to the rules and let the players work out the bugs. After one more movement of the ball, whoever set the Pin and rolled to the Flank will be back out on the perimeter.
Could you change and adapt some new rules with a Permanent Flank? Of course. We’re dealing with the lane, our Decision Box, so you could have your players do whatever you want when they’re in the lane. The question then becomes: “What CAN I get my players to do – consistently – without thinking too much and making things too complex?”
Here’s an example of a modification that I could live with: The ball is on the left wing with someone in the Nail and the Permanent Flank on the ballside (Left). A Cross-Key Pin & Skip is set by the Right Wing. The skip is thrown and the Pin Screener rolls to the basket and ultimately to the Right Flank. The Left Wing follows their pass to the Right Nail. At the point of the skip pass, the player who was in the Left Nail pops to the Top of the Key. So far, nothing new. Here’s where I might try a new tweak: The Permanent Flank who is in the Left Flank cannot flash to the Right Flank because it is already filled. So let’s require the Permanent Flank to immediately flash up and set another Cross-Key Pin Screen on the top weakside defender.
This would give you an occasional back-to-back Pin & Skip – two in a row – and put everything back in place.