Norma, it's been around 20 years since I've been to Philadelphia, so I really can't recall much. I spent a lot of time at South Street as well as 9th Street, so separating the experiences makes it a bit harder. I was making pretty good money at the time, living in Manhattan and covering a lot of ground in terms of seeking out the best food that NY had to offer. Philly had some incredible coffee places (to date, the best coffee I've ever had), but, everything else, in comparison to what I was used to in NY, was very disappointing. I had a lot of slices from random places and one after the other was mediocre- kind of like what the NY area is like now.
I wouldn't mind a trip back- not necessarily for pizza, but for other things, like cheese steak. During my travels to Philly, I was either a vegetarian, or, for other times, I was a picky eater and uncomfortable with the veggies typically found on cheese steaks, so I never had the chance to try one.
Dough has an insulating effect. The thicker the crust, the less heat reaches the cheese from below. When low moisture brick mozz bubbles, the structure breaks down and it becomes tender. Without the heat from below, though, the cheese has less propensity for bubbling. This is why the cheese on your Sicilian slice was rubbery and it's one of the reasons why I avoid Sicilian slices- the cheese rarely melts right.
This is going to sound a bit harsh, but if Joey were putting out a Mack's quality pie, he'd have a lot more customers then you two on a Saturday afternoon. Mack's location drives a great deal of their enormous business, but you can take that pizza, put it in any urban area, and you'll have wall to wall customers on a Saturday afternoon- especially on a hot Saturday afternoon when people don't want to cook.
Mack's pizza built their brand to be what it is by putting out a superior product.Taking an inferior product and putting that label on it isn't right, imo. I'm sure that he has a legal right to the name, but it still doesn't justify his actions. Quality should dictate rights to the name, not blood. The other family members might not be scrambling to sue him, but I bet you that if you had a chance to speak with them and they were being honest, they might not have the nicest things to say. If I had a relative selling pizza of that quality and using my name, I wouldn't sue, but I'd sure be a bit miffed.