I can't believe what I have already read. You have any knowledge about current balance or you are just keep up on theory?
Not really sure what you are on about it here.
I do sometimes play with mechanized doctrine for command tank and arty combo for variety(can't play same doctrine too long, thats why I'm against stale meta), mainly on semoisky, so I'm fully aware of ost arty performance as contrary to 90% of axis fanboys here on this board, I actually use it.
Soviet meta doctrines have no off map that would post any threat to static arty, you specifically need to go for ISU doctrines for that.
USF stand a bit better, but they got only a single doctrine able to reckon and arty the howi, but since its mechanized, its not really popular at all.
Meanwhile 90% of ost players have CAS doctrine equipped. Remaining 10% use the good old jeager armor with ele, recon and stuka dive which invalidates any attempts of allied arty play.
My biggest gripe with arty is the long cooldown, which ensures low cost efficiency of both, ML-20 and leIH compared to say stuka zu fuss, which is more accessible, more survivable(being mobile) and more deadly thanks to precision striking everything every time.
Talking about 2v2 here.