I know we have a couple of threads but I’ve not heard this idea and I think it’s really cool. Rather than arrows why not simply have the pathway glow with a soft green/blue, as if the taxiway had an embedded uniform maybe foot-wide soft-edged LED lighting strip covering the Progressive Taxi route, just bright enough be visible at high noon on a clear day and self-adjusting to ambient lighting, toggleable w/ a keystroke. I like this much more that sharp-edged arrows it’s just too gauche and foreign looking. I think if this were done well it could be made to look like it belonged there. To me this might be far easier to program too–they just need to define route and apply the correct shading to it versus creating objects per se that sit on top.
As well as making this toggleable, I would like to it back in the Taxi Clearance request in ATC as it was in FSX/P3D–this is where you want it, it’s handy. A keystroke to enable/disable would be nice as well for sure.