Firstly there are too many ridiculous ones like test jet engine SPLASHED DOWN. SOLID BOOSTER in ORBIT. Surprised we don't get test 'shute or jet engine on mun. Test faring on launch pad? There is no test button (!!) you have to pop the faring!
Next problem: If I start by picking, say, "plant flag on X".. I want subsequent missions offered to me to take this into consideration and offer me more test in or around the same location. Aslo if i pick test engine X on mun allow me to do multiple test on the same part say in sub-orbit orbit and landed on mun, I'm not going to take 3 different engines am i?