The shield into armor fix nerfs all missile troops Carl... Even with foot archers you generally try to flank because enfilade fire is the best kill rate of any attack type in the game... Making it so that archers can't do any better when flanking/rear firing makes them basically worthless (Which explains why you think the Scots are so good) whereas they're the best killers in the game without that kind of fix.

PS: I've stated this before but you seem not to believe it -- AP counts against shield as well as armor, so moving armor into shield doesn't make AP anything better.