BM-Kaido split the clouds, Luffy-Kaido split the clouds... in the same arc Oda shows us the two greatest pirates to exist, established in chapter 957 where Xebec got hyped by Sengoku.
The only other time in the series, Oda drew something like that was with Warcury. To make it obvious the man even used the same trees he used for the island in Roger-Newgate clash:
Warcury's Haki was so strong that it was knocking out some trained soldiers on the ships surrounding the Island. DR Xebec's Haki, didn't knock a single soul out, even the weak fodder civilians.
So yes, it's as good as DR Xebec, if not greater. Y'all just don't want to admit it, cause it's the Gorosei rather than some edgy looking pirate.