I agree with you. Qualitative data would be great.

It would be very satisfying to find out that one of the kids is now a doctor or nurse and working in the clinic that services the town. Or somebody studied agriculture and now helps farmers in the area.

There are a lot of success stories that could be a success for the person but maybe not for the town (like the person got their degree and was able to build a great life in some other place). I can't imagine there's a ton of opportunity in rural Tanzanian communities...