I think some thing that has to be looked at now is who people were mad at DA for not going after and who ended up where.
AD wanted the Lakers, got there, and there is no indication that he would have stayed in Boston.
Iriving wanted to go to NY, ended up in Brooklyn. Which is close, ownership probably made a big difference, but still ended up in NY.
KD, rumored to want to go to NY, ended up with the NEts, same as above.
PG13, rumored to want to go to LA, resigned to OKC, but demanded a trade to LA after a good season with OKC.
Leonard, rumored to want to go to LA, won a chip in Toronto, still went to LA.
I'm thinking DA isn't going to want to take a huge chance on guys who are rumored to want to play for certain cities from here on out, maybe thats why he didn't pull some of these triggers. Asking price to likely hood of them staying was too risky.
So making a move for a legit PG, and building around the J's might be a better move in the long run than taking on a AD or Leonard.