Update...no update yet. Dealer is too busy to have been able to spend more time diagnosing the issue. In other words, they had better priorities to consider. I'm not without understanding, but they've had it for more than two weeks now without any effort for diagnosis (by their own admission).
So, I'll be paying a visit in person today with the intent to set a timeline, but I have two other dealers around me as an option and I have no issue with having them service it instead.
My first experience with Kubota is with this tractor, I can't say it's started off as I had hoped it would unfortunately.