I will say the units of PD are more important for larger maps of 400+ size. Personally for multiplayer with large maps I avoid nations with weak PD... I lost a province to a simple 'call of the winds' despite the 15PD for Machaka.
A nice feature included within DOM_4 would allow nations ways of upgrading existing province defense. I haven't given much thought for exact mechanics, but ideally players with the most provinces should have a higher upkeep for these upgrades thus struggling players can put up a stronger fight as they start losing. Not sure if the upkeep should be gems or gold or stationed commanders or a combintation or something else.
*perhaps increasing upkeep as provinces are further from the capital... whatever upkeep combination is decided. *
No talk of DOM_4 in the future yet, but it's in my prayers.
