I would be very surprised if the weapon bay was changed. The original bay was already utilizing pretty much as much space as possible. It was almost oversized for a plane of that class. That being said, I don't think it'd be in PLANAF's interest to shrink the bay.
At the same time, there's really no room to increase it either.
It's a fair sized bay, for 4-6 AA missiles. or, alternatively, 2 compact a2g/antiship missiles or large bombs. More than that would be unrealistic for a plane of this class.