I agree with you on your two points.

I wonder if the gorilla would be crippling the lions limbs by sheer brute force. Throwing, yanking them out of sockets, twisting and squeezing them. The lion would fight like any house cat. And the gorilla would respond like we do when playing with our house cat. Gorillas would want to hurt and stop the attacks and that means huge amounts of force. Force they are capable of.