Ya I get you don't like the SG, but I'm loving mine. Out of the 8 females I got in a pack only one hermed out the first week of flower. The other 7 were pretty similar in smell and structure. Only one other SG had a lower pollen sack after 7 weeks in flower. I guess I was lucky. If another one hermed I guess we would be close to your 30% estimate but finding keepers is what keeps me in the game.
Two of them were larfy but gave a decent yield. Overall very good yield from all of them. Other than the larfy/leafy ones the rest had solid buds all the way down the branch. I have 4 keepers that will be quite hard to choose from. Totally amazing from 1 pack of seeds.
Same thing with my Twin Flames. NO herms at all. Not even a lower pollen sack late. 6 beauties and 3 awesome keepers that will be hard to decide which ones will be kept.