I think you mean how laughable the UFC roster is at that division. There are plenty of talented fighters not yet with Zuffa at Flyweight. There are some very, very talented fighters at that weight.
I wouldn't go that far. Sure there are some more guys that they can and will eventually bring over.
But what more can the UFC really do? Urushitani was a top 125er they brought him over he got steam rolled. Ian McCall was the top 125er, they brought him over, he was beat. Da Silva was brought over as the #1 Fly in the world till Ian beat him and he was beaten by a UFC TUF star.
UFC has the best 4 Flys in the world. Dodson, Might, Joe B, and McCall. They brought over top ranked flys from other organizations and they lost. They are trying to bring the best guys over.