I would start with the lack of bond bushings and the unbalanced phase conductors in the nipples. I have seen guys who would call the metallic nipples there a parallel neutral too but I have never called that one.
I suggested cooking a pop tart between the cabinets in another thread with this picture but we are on the same page. I suppose they may have cut a slot between the holes to break the flux lines but I would want to see it.
BTW, the neutrals within the CT can be 'as pictured, IF the install is hot sequence. (CT before Main OCP). IF cold sequence (Main before CT) the neutral must be isolated from ground. (Floating). This is an occasional 'Fail' for some that are not well versed in CT installs.
I have never seen a CT on the load side of the service disconnect because they usually want to seal the CT can and everything on the line side. The service disconnect, MBJ etc has to remain accessible. That may just be a local interpretation of "accessible" tho.