Altering the lore-based hatred for your faction's benefits isn't a good idea.
Just compare BMM - an industrial giant, in fact, the biggest corporation in Bretonia to Mollys - a rather small group of separatists, surrounded by the hostile territory in Dublin, limited in resources and fighting their war with long odds. While MMC can't provide a 1/30 (Just an abstract number) of the Gold Ore flow from BMM facilities and even IMG is meant to only dream about operating in BMM's high grade fields; allowing BMM to operate freely with only paying a certain 'tax' is somehow a waiver of claim to achieving something in Dublin. Even with daily Molly raids on BMM operations, they still can't match the power of their opponent, backed by a whole Bretonian Army.
In that case it's not a papercut or weakening and even not a soviet 'let's thrown our bodies on that tank and make it stop' - it's just denial to play according to faction traits that you're not able to change.