I'm not following your logic about KD here.
Basically he was going to most likely sign with the Knicks or the Nets along with Kyrie.
Now the Nets are no longer interested in him, and the Knicks might be, but Kyrie is not going to sign with them to be without KD for at least a year. So now it is all but certain Kyrie is signing with the Nets.
So, the knicks are no longer in the AD sweepstakes. That basically means the lakers are the only team he is willing to sign a long term contract with that are interested in him. One of the key assets that they would trade for him is their #4 pick. There is no rich paul connection to the pelicans - in fact they probably hate him for what they have done with AD, and they already have Jrue as their starting PG, so I think it is much less likely they would choose Garland than the Lakers.
Cleveland has Sexton they just drafted last year - so if that trade happens there is a good chance Garland will be available for the Suns.
I don't think the Nets will want to have two max guards, who both can play point plus pay Dinwiddie another 10 million a year for him to play 15 minutes a game. For one that is a bad utilization of money per minutes, for another Dinwiddie is not going to be happy in the least getting so little playing time.
You know - the nets should be the ones going after AD. They can outbid the Lakers, and he might be willing to sign long term with them.