Right let me put this situation to you, Scifi and myself were playing, me as UNSC and he was cov.
My fleet (unsc) Maximum Upgrades, no more fleet supply left, all combined into one fleet, at his homeworld attempting to force him to quit. Half of his fleet, Jumps into system and obliterates my fleet, only a couple of losses on his side, and they were to nukes. When i say obliterate it was more like decimate. All the meanwhile i'm watching the other half of his fleet flank me.
No way that was balanced.
As we speak Im fighting an Easy AI as UNSC fleet. Somehow he manages to replenish his fleet in minutes. For every ship i destroy there's 6 more to take its place.
Update: it ended badly 100 paris and 50 thanatos in one fleet, and a supercarrier, 2 carriers bumming them in another, PLUS a anchor fully equipped with fighters and spamming frigates, vs 3 DDS 20 CCs and 40 other ships, I'm constantly spamming in the next system to replenish the paris too, and yet every 4 seconds another CCS comes in system.