Interesting! 7/16" coupled with whatever your boot ramp was (typically around 5 degrees) and then binding delta on top of that probably has you at an actual ramp of 10 degrees or more. All I can say to that is "your ass must have been permanently planted on your tails" and if your quads survived even one run I'm nominating you for world's most fit man/woman?
Anyway it shows the absurd and almost always completely wrong idea that increasing ramp helps you stay forward is unfortunately still alive and well no matter how hard we try to kill it.
I would bet that if you took everything out this "expert" applied and put a lift under your toes you'd ski better than ever before, be more relaxed and find the ski tips turn in and react more quickly.
But that is just a guess and to be certain we need to know much more and Colin asked for it previously. The only time I use a heel lift to help someone stay forward is if they have limited dorsiflexion so really can't get enough ankle flexion to move forward. Otherwise although in the last few years many manufacturers have reduced boot ramp and especially reduced binding delta I think most skiers would still benefit from additional reductions.
That said this is a bit of a can of worms around here and it will be interesting to see what everyone else says.
To experiment remove all the shit and put about a 2mm piece of plastic between the bottom of your boot and the binding AFD and ski, CAREFULLY. This setup will make binding toe release dangerously high and unreliable so at your own risk. But if it works it is easy to make the mod permanent and safe, but maybe not by the shop you started at..
PNW I assume means Seattle area. If you are closer to Calgary or coming through we could help and there are fitters in Bend, OR and Reno/Tahoe area that could easily help.