Fire Emblem Warriors is a near-perfect marriage of two seemingly incompatible franchises.
This entry into the Warriors genre takes inspiration from several of the Fire Emblem series' most iconic mechanics. The Weapon Triangle improves the strategic depth of the Musuo genre by encouraging the player to form a well rounded team and pay attention to the locations and advantages/disadvantages of their allies. The Pair Up system removes an ally from the battle to greatly boost the player's hero - allowing the player to choose between more damage output/survivability and greater map coverage. Class promotion adds a greater sense of progression to the Warriors formula. The support system encourages players to vary their teams between matches to improve allied bonds and unlock later conversations that bring more depth to the characters.
All of this is complemented by a more streamlined, effective ordering system, which allows the player to determine where each of their AI allies would be most useful at any time. As the Warriors series is objective-focused, this is an enormous improvement to the formula. Map objectives become less of a frustration and more of an opportunity to make the most of the AI companions - who are far more useful in this entry than in any other game in the genre.
Fire Emblem Warriors is also the most polished Musuo game to date. While the roster is comparatively small and has quite a few clone character templates, each character feels fun, polished, and effective. There are no underpowered characters. There are no characters that feel lackluster to play. Even traditionally clunky, boring combat styles in the Warriors series (like cavalry), feel fluid and fun to play in Fire Emblem Warriors. This is a remarkable achievement which points towards an admirable attention to detail by Koei Tecmo.
That said, the game isn't without its issues. It is popular to criticize the roster, as this is the most controversial facet of the game with the Fire Emblem community. Older lords like Ike, Alm, Roy, Eliwood, Hector, Ephraim, and Eirika are entirely missing. Questionable inclusions like Cordelia and Frederick beat out more unique, important characters. This is a subjective matter, however, so I would not consider it to be a negative point for the game.
More objective issues tend to be much more minor. Namely, the spammed voice dialogue on character crest upgrades, buying/selling/upgrading weapons, support ranks, and other such features are incredibly annoying and cannot be disabled. Most players will likely mute their televisions while attempting to do anything in the camp. The level up notifications are authentic, but also break the flow of gameplay; thankfully, the level up notifications can be disabled. These are all surface level issues, which, while baffling, don't significantly impact the gameplay experience, in my opinion.
Overall, I would say that this game deserves praise. It's a large step forward in quality and innovation for a largely underrated, if somewhat stagnant genre. This game is a must own for any Musuo fan and the best possible entry into the genre for any player who is on the fence.
Increased tactical depth compared to past Warriors games
The most polished Warriors game to date
Every character is effective and well-designed
Lengthy story mode and a wealth of history mode content - great value for money
Repeated voice dialogue for character upgrades and other camp features will quickly become obnoxious
Abundance of cloned movesets
Lacks online co-op
Questionable roster - may not ideally represent the Fire Emblem community's wants. Your mileage may vary.