It's not the stamina, it's the fact that the CPU is dumb.
EA forgot to program the CPU so it knows it has less stamina. They throw dozens of punches thinking they'll have plenty of wind by the 10th round.
It's so disappointing. I would consider boxing games to be my favorite of all the sports games and I didn't even buy FNC.
FNRd4 had such a great foundation to work off of.
But FNC has been a giant cluster-bleep. The patches fix one thing and break 3 others.
You can't import CAB's without something breaking.
The Legacy Mode is so shallow and useless it's a wonder they even have it in there.
And we're a whole 18 months away from FNC2. Boxing fans are SOL.