Or just get tint!

Lol. I'm partially kidding, but I live in SFL and its easily 90+ with 100% humidity, however my car barley gets more than warm with 15% tint. I know its not exactly the same temp, but unless somethings wrong with your insulation a good dark tint will prevent the interior from getting hot.

What?!? Please explain... No wait NM, wrong place for that discussion and this thread shouldn't be used to debate opinions.
It is an option, it just happens to be included on the "optional" GT1 & GT2. It probably will be a stand alone option in the future, but sure Kia tried to limit customization on the initial Gen 1 launch, due to profit/losses. But I agree, and it would have been nice if they offered some items(like grey Nappa leather) as options instead of only available on the upgraded GT2. But beggars cant be choosers and I'm thrilled with my Stinger just the way she is!