Out of curiosity I looked at how much each player in our squad has played so far this season. Discounting Sainz, Sorensen, Hanley, Tomkinson, Forshaw as none have been fit enough to be really available (and the reserve GKs), the other 21 members of our squad have all started at least one game now. From a load-management perspective, Duffy is the surprising inclusion today, he's played the most minutes of anyone in our squad now, nearly an hour more than any other outfield player. Of the remaining players in the side today, 9 feature in the list of 10 fewest minutes played to date (Sara the exception).
Interesting look at other players. Top scorer so far on WhoScored is Fisher on 7.0. He may only be 19 but he gets better with every appearance. Placheta, Duffy and Long next best on 6.7.
Idah replaced by Barnes at 60 mins, that has to be a planned change to manage the load on the pair of them.