So, why would you want an airplane that tip stalls? (stalls at the tip of the wing instead of the root)
First let's clear up a few things...
A snap roll is just a high speed tip stall, caused by intentional stick movements. The only reason it's called a "SNAP" roll is because you "SNAP" the sticks quickly and precisely. That's all.
Contiunous snap rolls while descending is called a spin. A Snap roll is one revolution around, but we can do it as many times as the airplane will allow. It might make more sense to call them spin just because the airplane is moving forward.
A spin is when the airplane is spinning around falling towards the earth WITH the wing stalled. Throughout the spin the airplane is stalled (screwed up air, past the critical angle of attack).
The elevator on your airplane is the angle of attack control. Pull it back and it increases. By holding full back pressure in a spin, you're holding the angle of attack at the critical angle of attack. This is why it stalls and spins down! The same happens in a snap roll.
Because the Cap will stall so easily at the TIP of the wing, this means it can do some of the BEST snap rolls of any airplane ever created. It will do lightning quick snap rolls and incredibly tight spins. This is what makes the Cap such a great aerobat. You will never be able to snap roll a trainer for the opposite reasons that a Cap is so good at it!
So...How did I do?