Ok, interesting. So Haki counters DF abilities to a point Law can't even use his spatial hax to move their bodies. Previously argued how a swordsman could not stand up to Law simply due to Law teleporting their swords, but seems like that argument is gone. Haki really is the answer for everything.
And what does it mean, their Haki is too strong? Do they mean CoA or CoC (will)? Since they don't have their CoA active all the time.
CoA make at most sense, Doflamingo who have knowledge about Law power was sure that Vergo could block his slash with his own CoA, also Ceaser hype Vergo CoA, with making the question? Was Vergo haki stronger then even that from Doffy? Since Law haki could cut both guys, with means based on Haki: Law>Doffy>Vergo or Vergo>Doffy
Also Doffy statement:
But Doffy mistake was that he underestimate Law haki, who was great to a point to even block a clear cut attack of Doffy himself.
But the context is important, judging by Doffy you can block Law df power, slash or teleporting, both beeing useless if Law haki is weaker then the opponents one. As example Zoro and Luffy let them teleport by Law, but a enemy probably not making allow that.
We already ask yourself why Law just can´t cut Dragon Kaido, Oda answer our question with this chapter, his haki is weak and not strong enough to deal with these beast...
So my though over all the years that Law ability has his limit basically confirmed.
This: "Law can teleport Cracker out of his biscuit or cut all of them easy away" or "Law could teleport Katakuri" where debunked, these characters probably(because of Cracker, Katakuri for sure has stronger haki, if not even a another lvl) are immune to Law df power. This showing Law in a different light.