I agree that his v2 cloak is undeniably too durable, even his v1 cloak.
But regarding S2 Sasori can also take flight and stay out of Bee's range v2 range. Moreover, if Sasori uses ISW, he can stall long enough for the creation of a huge amount of Iron Sand. Last time he did ISW he generated this much IS
You must be registered for see images
Yes, that's an entire lake and you can compare it to Sasori's size on the rock. It completely changes the battlefield. Thus Sasori could simply have the IS beneath their Bee's feet encompass him entirely and suffocate him/leave him stranded in the dome. Potential to even put a small hole in their and have a puppet release a poison cloud.
Why does everything go back to Kakuzu for you? Foh with Kakuzu, this thread is completely irrelevant to him. And yes, it easily pierces him in PS given his vulnerability to piercing attacks.