Your talking about two very different things It is doubtful home resort priority for reservations could extended for those with high point counts, as they are deeded interests at all resorts, except maybe for the trust members at Ft. Wilderness.
Could the booking window for 7 months be change? Possibly, but imagine the nightmares this would cause both for CMs and IT. So I don't see that happening. For Moonlight Magic, it is a perk paid for by DVC Marketing, so it could be a way to sell more direct points, but again, the IT booking issues it would cause may not be worth it. Especially, when you consider the history of including even all resale members that purchased before the cut off date for "blue card" benefits. Their mistake was not having resale restrictions in place from day one.
As far as whether I'd be in favor of it...maybe for some small perks, but since they simply decided to charge eligible members for MMB instead, I think the MOST we'd ever see would like a 1,000 point club for free MMB or free exchanges to the Disney collection.