Good observation, I noticed that too.
I preferred the scenes back in the day when most of the girls seemed like the literal girls next door through and through; so not just in looks, but in the way they carried themselves. Like, many of them were the type that you'd see around your town and/or they had that average to above average "coworker" look and personality. Not sure how to explain it, but back then, it felt like they didn't make a point to perform in a professional manner for the camera. They were literal "amateurs" and somewhat "untrained" when it came to giving blowjobs and their reactions to being fucked seemed more "real".
They knew what they were doing of course due to all the sex they had in their personal life, but I prefer when it's an amateur having sex in front of a camera instead of a trained pro that seeks out the attention of the camera and does this like a total job for cash and fame. Performative and fake stuff usually doesn't get me like real stuff does. It's not every girl of course, but there are too many imho.
The other thing I'd like to see more of is larger loads. If I'm living vicariously through these guys, I'd rather live the fantasy that I'm feeding the women full, strong loads that they have to actually gulp down. The load quantity per dick has gone down for many of these guys over the years and I don't get it. The whole point of this genre is to feed the chicks lots of anonymous cum after they perform a brief blowjob on the nameless dick. Can't the guys wait a week to build up something worth shooting? I've lost track of the amount of times the guy barely shoots anything and the woman sort of hides the low level of seed by salivating and drooling before swallowing essentially nothing.