Okay, finally installed RFC Europe and played as Poland, so some thoughts about this, and mod as whole point by point:
- Poland lack resources, seriously it obvious that you are still placing them, for example where is wheat? Not a single in whole core territory when one UHV is "granary of Europe" and the fact that wheat export was primary source of wealth in Poland.
- There also should be salt in Kraków cross (Wieliczka salt mines, active as mine from XIII century), and perhaps some cattle in Great Poland, and some sheep in Podhale (under Tatry mountains) region. Placement of animal resources is mostly dictated by balance as they where raised everywhere.
- Honey resource it's also absent despite the fact that drinking mead was somewhat a staple alcoholic beverage in pre partition Commonwealth.
- Perhaps new resource of amber instead of place-holder gems? (on Baltic coast)
Well that's all about Poland in mod now something about units:
- Archery line makes me want to scream. Longbow should be English UU, archer and crossbow are bit to weak and useful only in defending cities. Arbalest should be last in line and most powerful. So perhaps something like archer - crossbowman - arbalest spaced bit more in tech tree, with archer (S4, +50% city def) and crossbow (as arbalest now) stronger, and arbalest raised to str8/9 (+50% vs heavy inf and cav, or perhaps +25% vs havy inf and cav? or some combination). Hmm, but then knight should gain +1 str...
- ...Or Archer as it now, then crossbow as arbalest it's now, and finally S9 Arbalest with +25% vs heavy cav and inf? (but no hills or city def bonus) Of course spaced more in tech tree, because archery units get obsolete too fast, there is no need for 4 units, 3 foot archer units should be enough.
- Axe is bit superfluous, sword should gain +25% vs polearm as longsword. So Axeman should go away. And sword available earlier.
- Grenadier, I don't know why but this unit always irritated me, they shouldn't get bonus vs line infantry because as of 18c. they basically were line inf, frankly I think that they are unnecessary.
- There is too big gap in heavy cav between knight and cuirassier, perhaps place some unit here?
- Maceman, rename unit to heavy footman, or men-at-arms.
- Perhaps mounted crossbowman as unit? Something like earlier dragoon?
Well I think that's all suggestions that I have, I hope that this is useful feedback to you, and mod is awesome BTW, thanks for effort!