They don't even have wings.
They are referenced as dragons, yes, but that's more of a point of comparison than an actual connection. Illidan also faced off against Nether Dragons in Outland that weren't actual dragons but creatures from the Twisting Nether (likely demonic in origin). They were only called dragons as a point of comparison.
And let's be completely real: the only reason the Pandaren named anything after dragons is not because of their awareness of the dragons of Azeroth or connections between cloud serpents and dragons, but because they look like real-world Asian dragons. It's a crack in the fourth wall.