Let's take a simple example to show to you that you really don't know what you are asking:
Lets assume grens and cons are perfectly balanced in 1v1. What change do they need to make to balance them in 2v2? My point is if the factions are perfectly balanced in 1v1 why they need to be balanced in 2v2? How are they umbalanced?
Gameplay shifts quite a lot. 4v4 is way more crowded than 1v1, since front line and map size do not quadruple. In team games it's less likely to be cut off, so resource income is WAY more stable, caches become more relevant, so gameplay shifts away from LV to late game vehicles. Artillery is more potent since it has more targets, loiters can be more devastating, but most of the time they are just shot down. And also a player can be taken out more easily if two or three players focus one down in one specific attack before the team mates can react properly, which can't be the case in 1v1 (obviously), where it is also much easier to predict the enemy, since you can keep track of the units and you only play against a single faction.
Balance in small modes is easier to achieve since there are less synergies (only units of the same faction can synergize) and there is no coordination with other players involved. In team games you can compensate mediocre micro by good teamplay, this is a level of complexity that 1v1s cannot have.
In short: Team games are mostly about teamplay and team synergy on a densely populated map with few gaps, while 1v1 is more about unit micro and exploiting unavoidable gaps in the enemy's front line.