Can you move the piston back and forth easily by hand? Some shocks don't fully extend themselves after being compressed, they rely on the spring to pull the piston out again.
A blown shock usually leaks oil and has very little resistance when you push and pull the shaft.
Im not good with the termanology lol but what is the piston? I dont think its leaking any oil but just front the whole pot holes/speed/bumps/or dips senerio woth that right front shock something does not seem right.