Smoosh, you put words in people's mouths all the time.
6A >Dice car/RC option select was not an argument saying "Hey, 6A is a good overhead", as you declared it was. It was saying "Hey, you can do something really useful, this will help your Jin a lot".
For the record, Jin's 6A is damn hard to block if you know how to hide it. The speed of an overhead is certainly applicable. Jin's is just too fast for me to react to, so I have to pure yomi his overheads, which is scary. Render hits me with so many 6As it isn't even funny (Side note; this is more of a "6A is more useful in America than Japan, where people don't block overheads well" than anything else)
But yeah. Be thankful there is an option for when your Dice car gets blocked that's auto-pilot and gets you out of being punished. Using that option select, you have a really strong hidden gimmick. And don't tell me 50 heat isn't well spent getting out of being punished and mixing up your opponent further, that's crazy.
Another note completely, what do you mean Lambda's 4B doesn't count