Women and men with small hands can’t get their mits around a double stack 45.
.40 SW might work but you would have logistical issues with a non standard round making the decision whether the change is worthwhile more difficult.
If they won’t use expanding rounds, they may need to completely rethink sidearms.
The 1911 is a fine piece and as the Gov. still owns 100s of thousands of them just open the warehouse. The only reason for a new weapon is so some congressman or senator can pick up a little loss change.
I have never held a Sig P-227, actually I have never even seen one but I recently read that it feels exactly like the P-226 in the hand and the dimensions are either identical or very close.
The P-227 has a double stack .45 auto mag which holds ten rounds. They also make a 14 round mag which I assume is a bit longer.