And what about CoH2? 2 years, still so many balance issues.
Honestly? CoH2 is pretty well balanced. If you've ever played a really imbalanced game before (Most EALA RTS games at some point) or even some of Relic's older games (DoW2 prior to TIOW patch, CoH1, Dark Crusade/Soulstorm etc) the balance issues here are really, really minor and don't really effect game outcome.
I remember in Red Alert 3 for a long time all allies had to do to beat Empire was build a cyrocopter, an interceptor and a vindicator or two and there was absolutely nothing that empire could do to beat it. (other than suicidially rush the allied base with proxy barracks, which didn't work against better players) They would freeze your units/buildings and instantly kill them with one vindicator rocket. If you tried to use Tengue to transform into a plane unit, they lost 2-1 to the interceptor and he could safely pump those out faster than you could get tengu to counter him. Literally every game you played with these two factions in it played out like this.
I remember in BFME2 that rohirrim with theoden could charge down an army of upgraded pikemen (their supposed hard counter) and literally trample them to death. (Keep in mind, trampling pikeman would be the equivalent to infantry running through an s mine field) Even with Dwarven pikeman (most hitpoints, best armour) you couldn't kill them, and rohirrim trampling units other than pikeman killed them outright. (They were also the best cavalry unit, so they won any fights between the two especially with theoden which had massive AoE buffs.)
I remember vanilla Tyranids being able to attack move and kill anything that came near while their disposable capping squad capped the whole map simply by building warrior broods and a hive tyrant with venom cannon.
Nothing in Coh2's history even approaches these sorts of massive balance issues that other games in the genre have had. It's Relic's most balanced game by far at this point in its life.