Most coaches take one of two approaches as you suggest. They either choose to get the ball in play safely and then run their half court offense, or they spend considerable time learning sideline inbounds plays. I think you should do both. There are often times late in a quarter, half, or end of the game when you don't have time to make multiple passes to score. In those cases having a set practiced play will give your team confidence it can score with only seconds on the clock which may decide a few games over the course of a season.
Plays work best when there are no tip-offs to what is coming.
Utah 53 means it's not. In case of the 2-3 zone, it has difficulty defending an attack that ends up as four flat across the baseline or four high across the free throw line extended. When this occurs the defense is also forced to flatten out opening the middle of the lane for high post flashes. Similarly you can attack 2-3 by forcing the center defender to step up to protect the high middle of the zone which creates a situation where the weak side defender must either choose to defend the post and get sealed in or protect the corner pass and get sealed to the outside of the low post. This particular sideline play demonstrates you you might create this opportunity.