Mike, thanks for the good write up.
I would recommend re bleeding each of your calipers, one second or less is not great. If that does not improve the delay if you wanted to spend the money a MaxBrake was a huge improvement over my built in factory controller. I have no noticeable delay.
My Dad just received his Kodiak Disk kit for his HH Premier 34'. It is on the agenda for this weekend. His kit has the sealed bearings. He also bought the Dexter actuator.
Also once a year pull each caliper and re lube the caliper slide bolts and any metal to metal parts with the proper silicone grease.