Another neuron mass impulse and wlla, I gots me another idea...

Since the building tree of units is SOOOO flawed...
would it be possible to allow the creation of arqubusiers & or musketeers in lesser barracks buildings so long as a gunsmith building is created as well??

After all, you cannot create a gunsmith without the gunpowder event triggering & it would make far more sense than to require a 12000 or 9600 gold barracks WITHOUT a gunsmith.
Instead it would take a smaller amount of 4800 (I think) and enable almost everyone to create arqubusiers with a simpler barracks.

For musketeers perhaps not only a gunsmith but also a requirement for world_is_round 1??

*starts nodding 'yes' in an effort for an unconscious repetition by onlooker*