This is probably the hardest Fire emblem experience you can get in vanilla games that isn't bullshit (looking at awakening lunatic+).
Lunatic reverse is such a satisfying challenge to face. The game always puts you in a difficult spot and it just makes you feel good when you're done dealing with its bullshit. Managing to get every side objective and keeping every character alive makes you feel like you completely dominated the game and I love it.
Overall solid but I don't think I'd replay it on lunatic reverse if I had to ever revisit.