Five Star Tuning Mod

I have a '11 Bounder with the 362hp V10. For the first 3500 miles I got 8.05 MPG pulling a 800# motorcycle on a light trailer in widely varying conditions. Then I installed a SCT Tuner from 5 Star. Still 8.0 RV now has better acceleration at low speeds, maybe more above 40 mph. It does shift better, except now in hills it does not want to shift out of OD soon enough so I lose a lot of speed unless I really gas it. Tow/Haul uneffected. I too do not like the high RPM's down steep slopes with Tow/Haul. I'm going to carefully try dropping it down 1 gear at a time manually, we traditionally practiced prior.