The one class Hobie Regatta system has worked well...to the degree that it has excluded other designs in the past I think the decline of the sport overall has seen to more "open arms" inclusion of ALL cat sailors recently.
Heck it's better to be racing against a pack of boats and different racing backgounds/skills than it is to be out there with fewer boats and the same folk all the time.
"A" fleet racing is the refined level of the sport and a given benchmark is assured through the single class structure. I like that but can see where including other cat classes supports the whole cat scene.
But from "B" fleet down I really don't care who or what kind of boats I'm sailing against just as long as the skipper isn't sandbaggin his or her abilities and the particular boat has a PN which can help factor in boat performance differences.
I've participated in many a "midweek race" in keel boats and they are great "just grab the stuff and go do it" events. But don't kid yourself...there isn't a one of those where the top third of the skippers aren't duly competiing.
I think this guys' article is less about single design racing, less about the midweek time slot, or even the setting....but moreso about the attitudes people take with them onto the race course.
Afterall, it's not the expressway, it's not the office or the corporate ladder, and for cats....until we win over the Olympic Comm..... it's not even the Olympics. As laid back as most of the Hobie crowd is on the whole....I really don't see conflict with what this guy is saying "oaught to be the way it's done".