Most of the joints are indeed tight, esp the cockpit. In fact I broke the instrument panel when trying to push it back! (I recalled later a member hv the same experience & Graham advised to push the pilot instead) Anyway some dabs of superglue solved the broken part. Even the wings are tight to swivel about as compared to my 0As.
As for shoulder joints, i cud not tell the difference fm 0As. They look & feel about the same. I hv the shoulder joints picture taken side by side with the 0A which I will post it later.
Overall the 0S in battroid is awesome. Glad I bought it!
I will report back with pictures back home today.