Americans are not necessarily favored for pit/col rewards time. It depends on the person. Rewards time at 10:20pm for me is absolutely terrible... usually trying to still get kids to sleep or help wife with dinner (she works nights some days) among other household distractions. I'm lucky if I can try once a month to get 2 hits in around rewards time. 3am would not be great but would give me better chances tbh.
Can't fix this issue with changing time zone.
Fair solution is to have master game clock that rotates 1 hr every so often, perhaps monthly after war rewards. I don't know how difficult that is from game end but after about a year of asking on forums, community has not received at least an explanation of why this can't be done (or even basic acknowledgment that idea is being discussed).