When I hear about something like this, I immediately get worried that they're going to eventually make this the standard process going forward even once Covid is over for operational efficiency reasons (although the free for all after 2 isn't exactly efficient, so they'd probably make changes there). Leave the park reservation system in place and then also allow you to hop to one other park in the afternoon, and that's the limit of a park hopper.
While it's of course better than not having the ability to park hop at all, if this type of reservation and park hopper system becomes permanent, it's going to really dampen my enthusiasm about ever returning to WDW. I want more freedom than that for the amount of money it costs.