Shorter games and lighter balls are possible. Smaller pitches and goals are not, because as it stands a football pitch can be used for men and women; if they need separate pitches, then suddenly there aren't enough pitches to go round.
I'm sure the women want to be changed early so they can warm up, just like the men do. An hour would be a good way short of long enough for the men to shower and change, the changing room to be cleaned up, and the women to change ready for pre-match warmup.