PotM in WC3 don't heal, therefore I see no reason it needs representation.
If you were to say Druids heal then sure. Shamans heal, then yeah they do. PotM? They weren't healers in the game at all, and they represented the Sentinel elite which were all warrior/ranger types anyways. None of the female Sentinel units or heroes in WC3 healed
Again, Thrall has abilities not represented to. Sure, shaman abilities carried over, so where is Shaman using Feral Spirit?
Would you build an argument that Shamans do not represent Thrall, Farseers or Shamanism because they are missing Feral Spirit? Because that's how you're addressing POTM unable to be represented, even as far as using examples of abilities that they never had.
Thrall has Feral Spirit because he is Thrall. Not because all shamans use Feral Spirit. Shamans can be represented fully without it.
Tyrande has Light of Elune because she is Tyrande. Not because all PotM use Light of Elune. PotM can be represented fully without it.
Rinse and repeat with Monks and Brewmaster not having Wandering Keg. You're basically saying this ability from a non-canon source needs to be recognized otherwise we shouldn't call this class a Brewmaster. All I'm saying us you don't need it to have a Brewmaster, and representing the WC3 abilities is really all we need.
Logically speaking, I would apply all those external arguments to whether the WC3 hero represents the class without said ability.
Would Paladin be a Paladin if it didn't have heals? No, because the WC3 Paladin clearly had Holy Light. Would Priestess of the Moon still be a POTM if it didn't have heals? Yes, because it never had em in WC3, the source of the class concept.