Good point about the goalies. Theodore, while (imo) a very good goalie, isn't close to being on Vokoun's level. I'm not so sure about your assessment of the D. Surely Jovo and Campbell (even if he isn't playing as well as he has) are upgrades over Sulzer, Olesz, and Callahan. Significant upgrades at that.
Also, I don't think you can say that Fleischmann, Upshall, Versteeg (and to a lesser degree Goc and Kopecky) aren't significant upgrades over Hordichuk (13th forward at best), Reasoner (done), Rissmiller (never had much game but done nonetheless), and Samsonov (done in all likelihood).
Like I said, they've upgraded all over the place. You're right, Vokoun > Theodore, but I can't imagine anyone thinking that Rissmiller, Reasoner, Hordicuk, and Samsonov > Fleischmann, Upshall, and Versteeg. Nor can I imagine anyone arguing that Campbell and Jovo (even at his advanced age) aren't an improvement over Olesz, Callahan, and Sulzer.