This is one of the best ways a game can build upon an established formula.

It ditches almost everything fe4 brought to the table but keeps what few mechanics worked and improved them to craft the best game in the series.

One of the best things brought back from Mystery Of The Emblem are growth enhancing items to put on your units. these boost specific attributes chances to grow and they all stack so this can lead weak units being able to snowball groups of enemies which is hilarious but the fatigue system does try to prevent this and it works well enough but it's nothing spectacular

PCC, skills, powerful/unique weapons being gained early, staff user being at their peak here and not being used for exclusively healing 10 hp for 90% of the game really encourages the idea to just use whatever god tier items you have on hand to beat the current map which I dont think many fe games encourage. Capturing enemies is also crucial to keep your supply of weapons, staves, and other items up to par.

Speaking of encouragement this game loves to throw plenty of deployment slots later on when your army is much bigger and it made me realize how many units I decide to use on a casual playthrough of the game. Last run I used over half of the cast willingly and all of them contributed at one point or another and I genuinely didnt noticed until I took count later.

At the end of the day I feel like I can pop in this game for a 3rd run and it will still be as fun as the previous 2 runs.