Reach is the only way to beat Conor.
Nate and Ferguson are the only 2 who can do shit.
Conor wrestling is getting better, and by the time he fights anyone with good wrestling - which will not be Khabib, he is losing to Ferguson, Conor TDD will be pretty much better than almost anyone.
He has the money to bring the best out there to train with him. Wrestling isn't a problem right now as Conor is already great at TDD, and it won't be a problem at all against anyone after Conor bring those people.
However, reach will keep being Conor hard thing to deal with. Conor striking style is made for him to wreck anyone who doesn't have a big reach, and he is doing that. Conor has a big reach, and he has the best counter of the game, also his speed is crazy. You can't do much if you don't have reach on him. And even with the reach, chin is also important, there is not a lot of fighters who can his shots.
Those who have will still need to have a good chin and good striking, and Ferguson sure has.
Those who don't, well, they will keep losing to Conor by first round finish, or they can get dominated like Holloway was.