Just to add on to that idea, because squad sizes bother me much less than other factors.
I was thinking one could combine the two screens into one. Give us the full info on both catering and fighting side-by-side as well as the troops selection part and then simply the two buttons for catering or starting the fight.
For me it goes like this:
1. click on province
2. click on "fight", without looking at the screen (as the information is insufficient for a decision anyway)
3. Check info on the fight, what kind of troops are on which position.
4. Decide to fight or not.
If the fight is easy: Fight
If it is difficult: leave and enter the province again to check the catering costs.
6. Decide to cater or not.
If the costs are acceptable: Cater
If the costs are too high: Click on "fight" a second time.
7. Decide to fight or not
If a victory is going to be expensive but more or less secure: Fight
If a victory is unlikely: Close the App and start the browser for a manual fight.
or alternatively ignore this encounter and move on to the next province.
This is a silly amount of clicking and time wasting, so I simply decide to fight every time in step 4, which is also the reason why I never cater.
having the full info on 1 screen would mean I could go all the way to step 7 without a single extra click
But yes I know I am a bit "special" so I never brought it up before, but if other people would like something like this I am happy to add my vote