Honestly I think they are overpowered now with Lucky status
I think they should either have Winged Hussars idea nerf (
in the entire game there is not a single idea/thing which gives +33% combat ability, except Poland!) or have worse tax/manpower or be less stable.
In my current game Commonwealth is ridiculously OP - I am Ottoman Empire, I have lands from Tunis through Arabia to Croatia and Crimea, I am allied with giant powerful French Colonial Empire and with united Scandinavia with top quality army, and we all had recently war with LONE Commonwealth. COMMONWEALTH IS IMPOSSIBLE TO DESTROY. More impossible to destroy than France or Russia. My super powerful alliance needed 7 years (!) to achieve warscore of 37 (!!!) and we all had to sent 100% of our troops to Poland to survive + hire 50 000 of mercenaries + take a lot of loans. I repeat: France + Scandinavia + Ottoman Empire vs Commonwealth which has no allies and only 'historical' lands. After 7 years of war Commonwealth STILL had 60 000 of soldiers and was still completely impossible to carpet siege, stackwipe, implode or anything. It is absolutely terrifying.