I am finidng this aswell, and it is having consequences for A.I warfare.
Basically all the majors, but in particular France and Austria are pouring money into fielding 40+ mercs at a time to extend their wars and help them overcome Coalitions and Alliances.
What this does in effect is makes a few of the major powers incredible difficult to stop, and France, especially if it can get going in the first 30 years basically becomes unbeatable, because of great generals and luck the longer wars go on and more battles there are the more likely it can reverse early defeats in those wars.
Basically all the majors, but in particular France and Austria are pouring money into fielding 40+ mercs at a time to extend their wars and help them overcome Coalitions and Alliances.
What this does in effect is makes a few of the major powers incredible difficult to stop, and France, especially if it can get going in the first 30 years basically becomes unbeatable, because of great generals and luck the longer wars go on and more battles there are the more likely it can reverse early defeats in those wars.