I remember going to a game in the Harrington era, where there was pigeon crap all over the grandstand seats, and fans were tipping ushers to wipe clean their seats--which were around 25 bucks at the time. Since then, things have changed quite a bit. The place is clean again, like the Yawkey days, but the ticket prices are sky high.
As for the width of the seats, in the old days, the bleachers had just bench seats, so seat width wasn't a problem out there. In the grandstand, I never heard any complaints about the size of the seats then, but maybe they're smaller these days. Or maybe the fans are wider. LOL.