british emplacement spam is a non-issue in team games if you know how to deal with them and have a correct teammate.
at least with ost, it can become a bit harder to deal with it as okw but it's still managable.
Ostheer has huge problems once the first Bofors arrives to support the mortar pit. This hard counters every flame-ht or flame-pio. The only saving grace is the mortar-ht or your chances of losing are high.
As for OKW, it´s easier countered. Yet it´s not a non issue. Being forced into dual Infanteriegeschütz every game is lame and reduces the quality of the game. The problem is not that it is hard to counter with OKW but how dull the game becomes.