When you arrange custody stuff you need to put that clause in there about making it a joint decision not just her opinion is the only one.
I understand your frustration cause she shouldn't tell you like its a done deal, she should tell you about the problem with picking her up after school and let it go to you as to how. If you can't come up with an idea, then moving her to the other school would be the last option not the only one.
Would your daughter have bus service or an after school program she can go to so you maybe able to pick her up later? I know our schools have asp which is after school program that watches them after school till 6 o'clock. Tell your wife you will look into it before she changes the schools.
Don't rely on the first grade teacher about the quality of the schools. Pull it up online and have a copy of it. You know for court purposes if needed. Each school gets graded accordingly.