I've been playing a non-game since December, the odd battle to keep me hovering at 2400+ medals and WAR.
The game dynamic in Global is really stale, IA was getting tedious but +2m costs and +2 days upgrade times is real design genius. Game assets - the AI, troops, interface, etc are like a pack of playing cards, change the rules, nice new game - BHG/Nexon have constantly given us Top Trumps, my R35 tank beats your L7 mortar, we want 7 card Stud Poker or Blackjack. Even war was only a tiny bit different.
And as for walls - without checking I think I have 120 pieces, to upgrade them all from L9 to L10 is 360m gold - in my achievement list I have apparently stolen 330m since starting over a year ago. I am not raiding like a lunatic for hours on end for a barely noticeable increase in wall HP that will merely slow down Mr Cheater by 0.001 seconds.