I had finally completed the Revelation path with my difficulty being Hard mode, and it's like they went out of their way to fuck it up. The beginning maps are tedious as all shit and only serve to power level Corrin while the rest of your team is just mediocre, or useless on Lunatic. The midgame has more standard rout maps like Birthright, but there really isn't many characters that are worth using, so you just shit stomp it with your early game characters of choice. I'd say the beginning of Endgame is when you get Xander and Ryoma, and the game shifts back into epic Valla map gimmicks. This game would unironically be better if it was just Awakening tier gameplay where pretty much anybody you want turns into a fat bundle of stats.
I'll definitely try that hack out though, I find one of the most enjoyable parts of FE is switching up the characters you use compared to last time.