Most of our week 31 tires developed splits early on, but when we started rotating them, they at least stayed put, none opened up/chunked. Not great, but workable. So far the week 50+ tires are better, though not perfect. I agree on a street car I'd be taking them back. I had the benefit of a running correspondence with the Toyo engineers, and could send pictures. Those weren't all happy conversations, for sure, but they were helpful. The RR's do seem to be more fussy to set up.

No doubt that they are more fussy. I have also found that between 3.5-4 degrees is close for most tracks. Use more camber on the right side for tracks that have more left turns and vise versa.
I usually keep my rear cambers equal and rotate tires cross ways as directed.
I have not gotten beyond 15 heat cycles so far but that is due to me cycleing tires out of rotation due to a single worn tire in the set or passing them on to racers who need tires.
I havent messed with toe yet but plan to do that on the next test day.
If you have someone to take tire temps you can really dial in the set up.