For Scapular control see Doyles "Functional Training for Sports". He describes the following sequence....

Have your clients lie prone on the floor or a flat bench. Start the exercise in the "Y" position (yes as per "the village people") with thumbs pointing up, contolled movement to the "T" position (thumbs up), contol to "W" position (i.e. arms adducted, elbows flexed, Hands switch to PRONE) and then to the "L" position (arms adducted, elbows move to 90 degrees, hands prone)........This sequence proves difficult for many and may well expose some of the weakness' you suspect. Good luck

Again lying Prone
"Y"
"T"
"W"
"L"
repeat