I think it was Don Nelson who once commented that the Knicks would never win a championship with Ewing as their best player. Regardless if it was Nelson or another, that comment can rub people the wrong way even when it is true.
the same statement however is true for a lot of really, really good players. it may be true for Joel, KAT, many others.
To win it all, it seems you not only need a loaded team but you need that "it" guy who always finds a way to win, not just merely play well, but to come out on top
Personally I love Joel and think he's made for NY, but i'm also skeptical that he's got that "it" factor. KAT i am sure does not have that "it" factor.
If I'm in charge and if I'm selling the farm for that one guy he needs that "it"
Addendum:
when i look at current NBA players there are not many reasonably young "it" guys the way i seem to remember from yesteryear. If i were in charge i would do exactly what Leon is doing in staying disciplined and building depth and developing players. I think we need more clutch shooting, and one guy for those tough moments when you need a bucket. AT the moment i think that's Donovan and hopefully on a cheaper trade (with the pipedream of Donovan essentially saying he's going to NY anyway so Cleveland might as well get something for him). There are a lot of guys i can imagine being part of the team but i think he would be that "it" guy.