This is very inconvinient, the temple, museum, university, nation, library, coalition, soon the parliament and what else, I am missing probably something? All these buildings give bonuses, some of them several times over and big ones at that: 20%, 30%. So you miss one and you suffer big time, which for a large portion of time you do, since upgrades for each of those buildings takes more than a week. You can not compensate 33% air power blessing whatever you do on the battlefield. In every other game all those side things will give you 2-3% buff the most, the main buff will come from upgrading your unit. Here upgrading your unit from one age to the next gives you 5%... And the only reason players don't feel this developer nonsense is I think because the game lacks 1vs1 real time combats, where an army fights against an army and not versus statick deffences. Which eventually the game should introduce, otherwise it will get more and more boring if they only add new buildings to upgrade and no action.