The worst part about the Knicks is that Porzingis might not have an all that great of a second year. Not because he doesn't have the skills to take the next leap (He's easily one of the league's better prospects), but because he's playing alongside Rose. A ball-dominant guard who is over the hill and doesn't make his team better.
I firmly believe Noah was the worst signing of the off-season. Not because he was overpaid or because he looked done, but because he was the last guy the Knicks needed. Melo and Porzingis are NIGHTMARE match-ups at the 4 & 5, but the Knicks for some odd reason think they should be at the 3 & 4. If they had just looked for another wing player (like Nic Batum or even Jeff Green), I'd believe in their strength, but they opted for Noah, which they are absolutely going to regret when they realize how badly he gets in the way.
It's funny because I believed the Knicks' best additions were going to end up being Courtney Lee and Brandon Jennings, but even those guys looked putrid last night.
You're absolutely right in that they should start from scratch and build around Porzingis, but since Carmelo has Knicks management by the balls with his no-trade clause, that probably isn't going to happen. What will separate Carmelo from the rest of the all-time greats is that he was never willing to make the sacrifices as a player to help his team win.