I, along with every basketball coach on the planet, find the ability or lack thereof to make foul shots mystifying. Dispite foul shots being unguarded medium range shots that often are the difference between a W or an L, too many players are just not very good at it. And these are people who are gym rats that have been shooting a basketball since they were in grade school. It is the one thing in basketball that a short slow 15 year old can compete head to head with a pro, and can add significantly to a players scoring average, yet still is a skill too many players lack.
Excepting a few bigs that don't venture far from the paint, my cut off point for what is acceptable is 80%. Of the four UConn players who have enough attempts to make statistics meaningful, only Aubrey makes the grade at 82%. Paige at 79% is puzzling. KK at 66% is criminal. AE is at a bad 68%; she seems to cycle through periods when she hits 85% and periods when she shoots 50%. I doubt Geno or AE could say why.