I doubt there is an arguement outside of vicious and heartfelt pummeling with bags of money that will make IW suddenly decide to do a whole UI revamp. They won't even put a little icon denoting what a province type is (Mountain, etc) on the top in order to keep you from constantly pressing the 'i' to find out terrain type (if that is all you are looking at), I don't think they are going to add a upkeep notation but they may add in a Gold cost for summoned units.

I have no sympathy for people who won't download the community based help references and would like them 'included' in the game. If only because newbies who are 'turned off from the demo' because they can't see upkeep probably wouldn't like any one of the many user-unfriendly aspects of Dom2 and decide to pirate/not purchase based on any number of reasons.