I'm fine with the current FE roster. Here are my thoughts.
![Marth :ultmarth: :ultmarth:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
- If they wanted or needed to represent Fire Emblem, Marth would be the first and best choice. He starred in the first game of franchise, and afterwards he went on to make more appearances including a sequel, a remake of the original, a remake of the sequel, and other games like Fire Emblem Warriors and Fire Emblem Heroes.
![Roy :ultroy: :ultroy:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
- At the time, Sakurai's decision to include Roy in Melee purely to promote his upcoming game was a fair choice. In my opinion, he should've stayed cut since Brawl, but if he's going to stay, he might as well have a completely original moveset, instead of being a semi-clone.
![Ike :ultike: :ultike:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
- Ike's a different story. He starred in two games, both of which were released outside of Japan, unlike Roy. He's also a bit more different than Marth than Roy is. For example, Ike wasn't born in nobility like Marth and Roy and many of the other FE lords were. His personality's rather different too.
![Chrom :ultchrom: :ultchrom:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
- Awakening, in all of its self-inserting, waifu-marriaging glory, is what saved the Fire Emblem franchise. Although it was meant to be the final installment in the series, its sales proved that finishing the franchise off here would be a bad move. And seeing how Chrom was the star of the show in Awakening, it'd make sense for him to be included in Smash. But like Sakurai said during Robin and Lucina's reveal, Robin had more potential than Chrom. Him being an Echo Fighter of Roy doesn't help with the "too many FE/sword users" case either.
:ultrobin- Robin, at the time of Awakening's release, wasn't exactly so popular. He was seen more as a self-insert character than as his own character. Sure, his base Tactician class allowed him to wield both swords and anima tomes, but that didn't change much in his popularity. I'd even go so far as to say that Chrom and Lucina were more popular than him. But he still makes a fine addition to the Fire Emblem franchise, demonstrating the series' weapon durability mechanic.
![Lucina :ultlucina: :ultlucina:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
- Ah yes, Lucina. The one everybody likes to complain about when it comes to Fire Emblem characters, especially in Smash. She was originally meant as an alternate costume for Marth, but Master Hero Sack of Rye decided to give her own spot as a clone of him. She had potential, I'll admit. She could've represented Awakening's child inheritance mechanic. Her moves could've been based off the variety of skills in Awakening, for example. But so long as she remains in Smash as a Marth clone, the topic of "too many FE/sword users" will be frequently brought up within the Smash community.
![Corrin :ultcorrin: :ultcorrin:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
- Like Roy, he was included to promote his upcoming game, but joined Smash with a completely original moveset, while representing the Manakete/shapeshifting races of Fire Emblem. He also makes a fine addition.
The two major problems with the Fire Emblem characters is that:
- There aren't enough non-sword user Lords in Fire Emblem. Hence why all of the current FE roster uses swords in some way, shape, or form.
- Many of them are too similar to Marth. Roy comes from the GBA era of Fire Emblem, which has their own animations to choose from. And Chrom and Lucina comes from the 3DS era of Fire Emblem, which also has their own animations to choose from. Point being? There's a lot of source material to choose from their respective home games in order to create their moveset, but Sakurai chooses not to do so.
So if these two problems were solved, there wouldn't be as much discourse over Fire Emblem characters in Smash as there is now.