No faction should have a point in the game were it's better than other factions.
O M G
I 100% agree with something Alex said.
I have said it many times since USF came out... It is an absolutely f-cked game design concept.
Early strength means that given equal skills you should be able to dominate (if not every time then most of the time). Of course if you do you have an unsatisfying 5-10 minute game that felt like you were always winning. Unsatisfying for you, frustrating for the opponent, and when the tears flow the "strong early faction" will get nerfed.
The mirror image is that the opponent gets to feel like he survived and outplayed when all he did was last until his forces were "OP" (yes, for most of us equally powered forces are not equal if the micro required to make that happen is ratcheted up really high). That implied skill early on, and they get a "satisfying" victory because they made the "come back" when really the game was just to survive long enough. Of course nerfing the "strong early" factino helped, didn't it?
The strengths should absolutely NOT be asymmetric over time! They can be different, but they should not be asymmetric. This chart just shows there is a fetish at Relic for difference for difference's sake.