In terms of the seat, UA F is far better than the regional NH and OZ C Class seat. However, the flight is short enough to negate the differences. If UA fits your schedule and you want to try out their F product, then you may give it a try.

UA uses a 777 on this route, so it is old F product as of now, although I personally think it is a pretty good F product with true flat seat (not to the standard of the new suites of course) when not factor in the hit or miss service and C Class meal that they serve you. There is no gurantee that they will retrofit their 777 with the new product when you fly the route. I understand your flight will be a year from now, but given none of the 777 has the new product now flying yet together with UA's pace plus the merger, it is not surprised that UA might not be able to roll out all retrofitted planes by then.