This waiver made the 5.5 displacement limit completely irrelevant rule. Corvette probably wasn't too happy since prevously it had to drop its bigger V8 block due this rule...
I'm not a huge believer in the road-race car technology transfer marketing bullcrap, but I don't like that new BMW uses V8 unlike its road car versions. GTE is much more relaxed in this sense than the old GT2 was.