T5 in lowlands ?! Lets say you open the last land on LL for 3bil. How logical is it going to be that you knew ultimately knew you were going to place a supposed T5 (colony at max level4) for the cost of 150bil ?! And as alot of peeps have already mentioned it takes away the entire idea of having Highlands for that. Besides, rumor has it T5 lvl5 upgrades are coming soon, which makes the idea for T5 on LL even more pointless.
As a BC player, I don't care... Whatever will bring fresh blood and keep fresh blood is what I care about.
LL, HL, HF (yes, I know, HF is already ug to lvl 5) and "new lands" should all be upgradable to lvl 5. Why? Simple. Programmatically, the devs need to make minor changes to the different levels, stats per building per lvl and more importantly, it evens out the lvl upgrades per land area. Seriously though, it's not a major adjustment.
^ and I know this would be a larger impact on sh builds. One resolution, build towers. Primal Wars have proven this fact that towers are needed.