Not really. Repair speeds of ost and su are slower than all other factions. It's a problem especially for ost because su has commander abilities such as self-repair, conscript repair and repair station. Ost slower repair speed makes it impossible to play their tanks effectively as they need very often two pioneer squads tied to a tank to make it battle ready in a time similar to other factions. It is a huge contrast, especially with US, where crew just hops out of a vehicle and repairs it more quckly than a dedicated pio. Remember that each pio is 200 manpower. Retreating them from a battlefield or building more of them means you have less infantry on the field as ost, which further complicates the gameplay for ost and makes it imbalanced.
+1
Good post!