OH is an overall rather weak faction, that crutches on a handful of doctrines and the sniper to stay relatively competitive; and thats been the case since at least the Guards/85 meta. I might add that this is reawlly the worst thing about it: OH offers the least amount of competitively viable strats/builds by far among any faction in this game because its core units (Grens,42,Pgrens,Pak,T3) are too fragile and their synergy is too weak these days. The propensity of your 4-man mainline infantry to get oneshotted by AOE weapons/mines/what have you especially makes conserving their vet insanely difficult and the gameplay experience overall frustrating. To reiterate however, what irks me the most about Ostheer is the lack of variety: If I actually want to win against semi-decent opponents at my level of mediocrity (roughly top 100) I need to cheese insanely hard with snipers and call ins, whereas the same does not apply to other factions.
In contrast, just about any Soviet doctrine is at least somewhat viable - even though some of course are rather more viable - and the same (gasp!) goes for US. UK I won't comment upon. Don't believe me, think I am exaggerating? Try playing Ostheer-and subsequently the other factions- off-meta: There is no comparison. You'll be convinced in no time.