National Primary Compromise: RCV, many voting days, one counting day

There's lots of debate about how to structure the presidential primary. Maybe a few small states should go first because 'retail politics' is valuable, but maybe it should be different states sometimes. Maybe states should be grouped into regional blocks and rotate off which region goes first every four years. Maybe we should have one national primary on one day so no one goes first or last and everyone gets an equal vote. And whatever the schedule, we should vote on Ranked Choice Voting ballots so there's no 'spoilers' or 'throwing your vote away' and people can honestly say who they like first, second, and third, and so on.

Personally I favor one national primary day. US President is the one thing that everyone in the US can vote on and we should all do it together. No one should go first or last.

But I'd like to propose an odd compromise: Many voting days, one counting day. We can have exactly the same schedule we have now or any schedule. Everyone votes when their state comes around, but then all the ballots (RCV) go into one big pot. We still get retail politics, we still get an extended campaign where candidates talk to more voters, but late voters can still potentially cast an honest rankings ballot that's more complex than the decision many people are forced to make now of voting for their honest favorite or a less preferred candidate that seems to be winning. No splitters, no spoilers, but still mostly the familiar system we have now. When all the votes are cast, count all the ballots in one big RCV process to pick a winner.

I would prefer if the votes were secret until the last vote was cast, but that's not necessary. Revealing votes early will cause some bandwagon effects, but people can still vote honestly that they like someone else better even if the bandwagon doesn't seem to be going that way.

This has a sneaky side effect: direct election with no delegates and no convention. We had a vote and there's a decision. I guess there could still be a convention, maybe have a one night media event where we rally around the winner. I think most people don't want 5 days of boring speeches of politicians talking to each other.

So, that's my idea:
National RCV Primary: Many voting days; One counting day
I'd still rather rally around
One National Primary Day on Rankings Ballots
but what do you think? Workable compromise worth doing or go big for the full reform?