And your view on those two wonderful nations are totally impartial hmmmmmmmmmmmmm
My English is very bad, the only wonderful and great civilization is Indian, the other is only the United States but in Africa.
Anyway, I think this is already too off topic so I can say something about Ireland.
I do not see the form of your unique units, I think you have to think a little more about making a functional unit roost, for example you have the volunteer, which is a cheap (heavy?) infantry.
of political options you have for a match to the constable that is a cheap (heavy?) infantry. and on the other side to a healer (infantry? monk?)
anyway you have a lot of light or heavy infantry and until age-V you get ranged-cavalry
now compare it with the roost of the United States.
in age II you have between a skirmisher-type unit with medium food cost and lower coin cost and a unit musketeer-type unit with medium food cost and lower coin cost.
in age III you have a all-around ranged-cavalry vs a overspecialized ranged-cavalry.
in age IV artillery good against heavy infantry vs light infantry good against heavy infantry.
age v, super ranged cavalry vs super melee cavalry.
Notes how the units complement each other.
same with the canadians,
age II: heavy infantry good against heavy infantry in melee vs grenadier good against heavy infantry (naturally)
age III: short range skirmisher vs long range skirmisher
On the other way, in the Austrialians not complement each other but each game clearly favors a game style and its a bonus-weakness.