Everyone knows what happens to 3rd gear when you flat shift...BOOM!
Nothing wrong with having a big turbo, it all depends on your application! If you want a straight line or QTR warrior then fair do's!
But for everyday driving, there are many scenario's when it is going to be a proper ball ache.
If it is not going to be on a street car anyway, then there is no issue I guess.
Ignore the 12K stuff mate, never happened or was proved. Do you know how much research/work would need to be done mate?
Trust me, it would not happen.