I'm not good enough for G4, only reason I can maintain is that most are indiffferent towards 3v3.
Sure, we can hypothesize "great" solutions like yours. But if it's just more free & easy rewards than it aint happening!
The way I see it now, many don't really care which gold tier they are in. Many intentionally do the G3/G4 dance every other week so they fight solos 12 or 13 days out of 14. I'm content with the lack of competitiveness that exists lol.
I think a simple expansion of tiers (changing a few constants in the code that has already been done once) is a much better solution (and likely) than introducing new tiers. Plus trying to throw in as many free rewards as you can is like throwing tax cuts on your legislation lol.
Do any palyers really want plat 3v3?
I think Plarium more interested in push Live participation, though their strategy suksballz at best.
Replace classic tourneys with Live tourneys
Expand Live windows, more (4 to 10-12), shorter 1 hour, total hours (8 to 10/12)
Increase limit from 4 to 6 primals (I don't think this makes sense for them to do as less than 1% are hitting max of 4, and increasing engagement beyond that likely has 0 benefit to Plarium)
I do the G2-G3-G4 3v3 "dance" as you call it. I float freely among those three levels, doing the least amount of real work possible while maxing out my gold bars and CVC points.
I don't really know if I am good enough to hold G4 becasue I have never tried. Whenever I promote to G4, I always leave up the one man defense all the way through the weekend. It's a great way to win 6S Lego Relentless in the Tag Tourneys.
I realize that I may be in a small minority, but I actually enjoy 3v3 Arena, and if there was a G5 or Platinum 3v3, I would try to place in it.