No more Instant upgrades?? farm, caravans, oil well etc... just like this image, you guys could PLEASE repeat the same buildings or change, THAT WOULD BE A GREAT 10th ANNIVERSARY GIFT
I think it's time to upgrade 1 slot in the arsenal, perhaps when the player reaches level 200 or more, and the library as well. At university it is possible to level up more than 5 at the same time