I seriously can't make sense of the Citroen. Sometimes it seems quick enough, other stages it is too slow and it seems to be consistent on re-runs of stages. It is like it has one fundamental flaw which is only showing up on certain stages or something.

If citroen was smart, they'd stay behind and check where they had pace and where they didn't compared to the others and then go and very seriously check the roads on those stages. That would give them valuable data on what to improve.