Personally, if you managed to modify the top panel (so that it displays the new buttons and options such as Mercs) and the tooltip (so that it provided info on UU/B's on the Civ Select and tactical tile info), I would willingly stop using EUI. Those are the two main features that keep me using it. Of course, the community opinion matters far more then just mine. I must applaud your willingness to attempt compatibility with so much. It means a lot.