ever though about the points that the SF has the wrong skills for 2-3 and that LI isn't always the same?
you have to differ between a close range LI and a mid range LI. If your Bigs are far more stronger than your guards and your guards can pass exellent, you will have a close range LI. your bigs will take most of the shots near the rim. If your Guards are stronger, the whole play will slide to the mid range. your bigs take low percantage shots and your guards try to score more on their own. and now imagine, you are playing against a mid range LI with a 2-3 zone...
yeah, you have the right defense but you defend the wrong players. if you don't believe me, take moutlinhos tool and watch through the games like i did. and you will see how the defense works, where and against what SB is effective and so on. i analized more than 500 games over the last seasons from LI, RnG, Iso, Motion over 3-2 zone, SB, defense to LCD and how the engine decides which player will play.
have fun