Appreciate the input! You say "last time I played in person," I'm guessing that means you also play/run more often online? If so, I'm guessing you use standard online then?
I've seen a few options now: clustered, popcorn, a number of other ideas. Stuff like popcorn means that initiative features don't get used...
The toughest thing here is playtesting: I'd probably need to pitch "danger room" testing to players, they wouldn't be happy if trying out funky initiative systems resulted in them having setbacks in our actual games