Why does the NCAA have to be different than USATF/Olympic Trials?
People are complaining about hitting qualifiers in March but at USATF you can take a qualifier from the prior year.
Can you imagine a regional system to make it to USATF?
Both meets have the same objective, to get the best 24-36 athletes in the country in each event to compete in prelims and finals.
A top college athlete in the east, for example, has too many obligations especially if they are world class.
They will have some invitationals to run a fast time (to qualify for USATF), Penn Relays, Conference Championships, IC4A's, 2 rounds of NCAA regionals at one location, 2 rounds of NCAA's at another, 2-3 rounds at USATF, European season, World's/ Olympics in most years.
The usefulness of the regional system is solely to qualify athletes to the NCAA Championships that probably will not make it to the finals, in place of athletes that would have made it on time but would not have made it to the finals, all at the expense of over-racing the better athletes as well as costing additional money.