Winston just looking for a janitor job in the first movie and never adds anything to the story.I thought about that when I peeped it too. I had to do a quick dig into my memory to think of what they had Winston do in the movies and yeah you could take him out of both movies and nothing changes. Leslie is actually key to the plot. Which is good but also messed up at the same time.
he just shows up out of nowhere in GB2 with no explanation.
In the GB2, the trio capture those ghosts in the courtroom and say "We're Back!" then it cuts to all 4 of them in the streets ghostbusting
Atleast Leslie had an encounter with a ghost by herself in this and had important lines thoughout the movie.
If i was Ernie Hudson i would have been hot watching this