Seems similar to mine when I tore it down for the Carpenter project. This was running on a dyno tune, (header and Ramair). Typical for averaged tuning.
Certainly can! Since most tune the Rocket with averaged fueling, this is a logical outcome. Heck even old carburetor bikes had richer jets on the inboard cylinders.
In our case the rear cylinder gets the brunt of the heat. Per cylinder tuning will alleviate the varied per cylinder AFR. Since none of the aftermarket pipes are bunged on each cylinder it’s more challenging to get AFR on each cylinder. Tuneecu has per cylinder tuning capabilities, I’d certainly like to have my bike tuned again per cylinder.