Even though I feel your troubles, I understand why they take so much time to heal in order to keep balance in the game. The heros give a big advantage in attacks, so they have to have a level of exclusivity. It's been reduced quite a bit already actually through the years. And the recent change to extend the guard to 1hr helps as well.
Not only is this in the "Ideas Ruled out" thread you were supposed to read before posting, but numerous threads have been created already. Please search for related posts before making a new one on the same topic:
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