None of the changes you are proposing would help HC bring in more players. Most people don’t like losing their characters, those change wont change anyone’s mind in that and really nothing will. The only thing I see those changes doing would be to help gold farmers/bots, where their automated systems would have an easier time avoiding deaths as they farm for materials, which they can then transfer off server.
As for the current HC players, it’s possible that some of them would actually leave potentially cancelling their subscription if those changes were implemented, as HC players don’t want the the leveling process turned into a joke, which those kinds of changes would do. Ultimately if implemented those changes would likely greatly increase bots, and decrease actual players.
Classic ERA (Vanilla) never closed, Whitemane and Mankirk both have solid populations even with Fresh, and they will recover more when the fresh servers move onto TBC.