I wish the 2-3 zone was as easy as that to get to work. I used the 2-3 zone in a game i was sure to lose just to see what it did: (71840643).
There's not much more in that game i could have done about the defensive part. I got three bigs defending the paint that got 15+ ID/SB and 8+ OD. None of the guards have low OD and the two starting has 8+ in ID to.
But I thought we had heard that SB should fix the 2-3 zone.

Unfortunately, the 2-3 zone in most cases is like a small store that has had problems with customers stealing items from the shelves deciding to put the cash register outside, unlocked, so people would stop coming in to steal the product. It might stop you from getting beat inside quite so much, but it certainly won't stop you from getting beat.