Here’s a broad overview of the later TNG jumpsuit, as generally seen from season 3 onward:
And here’s a comparison of the early TNG jumpsuits (from seasons 1-2) to later ones (from season 3 onward):
The later TNG jumpsuits obviously inherited their overall aesthetic from the early ones.
However, this “final” version was neither haphazard or immediate; it was the result of ongoing consideration and experimentation throughout season three (and indeed, continued to evolve throughout the remainder of the show).