To be fair as bad as a lot of things on the 197s are the seats are one of the better bits.As for having a long-distance seat, my understanding is that the seat in first class on the class 800/801/802 units is the "Fanisa MD" - the same Fanisa who manufacture the 'Sophia' found in standard class on the 197s and the 800/801/802. Further, I understand that the 'MD' stands for Medium Distance. Obviously the TOCs/DfT would specify a higher-spec seat for first class compared to that in standard class, which means the 'Sophia' is intended to be an inferior seat to the MD. Therefore, standard class passengers are getting, at best, a low-spec medium-distance seat.
Having been on a 197 then a GWR 80x the 197 version with the modified cushion is far more comfortable.
That said, when 158s (and previously 175s) roll in on 197 diagrams now there are often passengers commenting its nice to get the old trains back!