You clearly don't understand why Warhounds are underpowered

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Simply put, every shot from a Warhound needs to be the equivalent of a nuclear missile with the attack range of a tempest and no friendly fire. All the other changes you suggest would not make the Warhound strong enough to justify it being used.

Also, Protoss shouldn't get them, because it's outrageous that Protoss almost win as many games as they lose.