Bill, this is [[[Generally]]] my take, but each case is different
There are situations where HCEs should be limited around the beginning of the year from Maximizing their deferrals (e.g. deferring $18,000 on the first $25,000 in salary). In few instances, a couple of those HCEs may end up deferring $3,000 on the first $4,000 in salary and then leaving the company in January. Mathematically, you'd have $6000 in deferrals that sent two 75% deferral rates for HCEs in the ADP test; and the failures will cause those who deferred at $18,000 to receive distributions.
I just say this to re-emphasize that each case is different. So, the demographics of the employees should be studied and the clients should be made aware of the different possibilities and then counseled into avoiding these types of pit falls. But, I do agree that most of the time it's not worth it. It does get challenging when you have HCEs who have low Compensation during the year but high (percentage of salary) deferrals.
Good Luck!