The NCAA seems to have many nuances regarding shot clock rules that appear to go beyond simply giving a team about a half a minute to hit the rim after a change of possession. Frontcourt or backcourt. Less time in period than on shot clock. Sometimes resets to 20 seconds. Kicking or punching violations. Legally touched inbounds. Missed free throw is controlled. Held ball (not the same when offensive or defensive team has alternating possession arrow).
As a non-college official, these are the nuances that I'm aware of (yet may not fully understand). There are probably more. Makes me hope that if Connecticut goes to a high school shot clock that the shot clock rules are as simple as possible.
I'm a pretty good rules guy, so if Connecticut goes to "complex" (NCAA-type) high school shot clock rules I'm sure that I will be able to study and fully understand them, but we've got a few outstanding (great physical shape, understand the game, understand advantage and disadvantage, great game management and people skills, get calls right almost every call, great partners, etc.) varsity guys who are not necessarily great "rules" guys, who may struggle.
And, of course, we've got guys at the table at some high schools who aren't the sharpest tools in the shed.