I wouldn't call MAR doctrine as a sim city "booster" like you suggested Flash, because it actually gives you more aggression rather than sitting still waiting for the enemy to attack you. I for one have used it quite effectively with aggression from early on. (no emplacements)
At first I had no idea, after watching this game from Luvnest perspective then yea, he did. Which brings up a question, to effectively use PIAT's, you have to attack ground ?