I seem to recall (have read the reports but not immediately to hand) that one or two (or in fact rather more) injuries/fatalities in the Brent Spar and Comorant accidents were directly attributable to old seat design standards.
I think window size is probably close to the hearts of those pax who have had to egress under water too (above two accidents, plus the Claymore S-61 for example). Maybe that's why the 76 and 332 L1 have enlarged rear window nowadays!