If approx. 3,000 are to go up 2.5 levels until the end of the game, that would be 7,500 infrastructure upgrades in about 15,000 days, or one upgrade every other day, in GW2 (HaF) which is far behind in infrastructure upgrades.
The system is not really keeping up. Looking at the 2 upgrades that took place in 12 days, that's one every 6 days, or only 1/3 of the needed pace.