PICUS is pretty meaningless after you have your ATPL issued anyway.
It was only ever invented so that airline cadets could get their PIC time up for ATPL issue.
Employers aren't interested in it.
Most upgrades hack it out of there log books so there running totals only show proper PIC time which is what you are always asked for in job applications.
I got my PIC time as a flying instructor so only have my PPL/CPL and IR test passes logged as PICUS. All my FO time was logged as co-pilot.
In theory you not even meant to log it unless there is a method specified in your part D and the company is approved. The UK has always pretty much ignored this issue and even the fact your meant to get every sector signed for by the PIC. Other European authority's its a right bloody faff anyone logging it.