Read the topic title carefully, will you? MG bunker.
Its called asymmetrical balance..
Ost have the worst and most expensive healing.
They happen to have a kinda meh bunker which doesnt cost popcap (but does drain their already in demand munis).
Do you just want all factions to have exactly the same abilities and costs, because thats retarded.
Ost is a very defensive faction, hence why good defensive tools and not so great attacking tools (like 6 man squads and great healing needed to grind out assaults).