I loathe the Flyers. Loathe. Them. That said, what you are spouting is revisionist history at best and factually incorrect at worst. MDZ had one stint with the Rangers. He was sent down to the minors to get a few games of work, and promptly got injured for the remainder of the season. He came back for his third year, filled in for an injured Marc Staal, and got Norris votes.
Literally, the ONLY season in which he didn't look like at least a 2nd pair guy was the season that AV had him. AV set out to destroy that kid in the media, on the ice. He succeeded. So you can babble about "two stints with the Rangers" and him "not being that good," but there are two things that are clearly obvious to most people:
1- Del Zotto had ONE bad season.
2- Re-signing Staal and letting AV torch MDZ's value was a huge mistake.
Edited to add: Unless the player going back in trade is Staal, MDZ doesn't make sense for the Rangers. We need someone to play top four on the right side, and MDZ is just not capable of doing that (and I think he'd retire before putting up with AV again. That freaking clown used to criticize him after games in which he DIDN'T even play).