Overall, I hope USDAA really considers the gap and adjusts it. I mean, if they don't, there's always Performance and I'm good with that.
A woman in my agility class has an Aussie the size of Koji. He's been knocking bars at 16" so another trainer suggested he jump in practice at 20" to get his jumps back (as in not flat). So, last night, since her dog never jumped 20", she did it at 18". I told my trainer I'd like to do that with Koji too. Mostly because I can see him getting close to dropping triples. Everyone agreed, Koji and the other dog look much better at 18".
I was unsure how Koji would do, because our course was made up of about 12 jumps all requiring RC's (obviously, that's what we were practicing). He can go up to a jump and clear it easily. I think 20" would force him to jump nicer. Not sure if I'm willing to jump him at that to train. I'll ask my trainer.
But overall, I wouldn't mind running Koji at 20" at his height (17.5 or more). But yeah, 22" is easily done for him, but I bet it'd be really hard on his joints. I'm just hoping training at 18" will help him remember to jump better, especially for those triples.