I push back on this because there's a lot of good dancer tricks in this game. Paired with byleth's goddess dance you can hit 6 refreshes in a map which is crazy. He gets passive healing and stat buffs on those he dances. He's perfect for canter and quality time. Refreshing an engaged corrin unit means that corrin unit now gets to lay down twice as much fire or debuff/freeze twice as many units. 10/10 insane unit for just stunting on the enemy team. In chapter 21 the dancer is critical for staying on top of enemy reinforcements and letting you soak up that sweet exp.
Anyways I'm on my third maddening run gonna go into the fourth with a challenge run (barbarian horde: berserkers, warriors, wolf knights, and wyverns only). I agree largely with the placements ± a point here or there. My main disagreements are chloé. She's perennially placed at the top even though she has insanely low build and strength. It's usually hand waved as fixable with wyvern lord but I find that not true. I'm doing a challenge run right now that involves using clanne who has similar stats to chloé and I have him on wyvern and it's really only his Erika ring keeping him relevant. I'd take her down a peg.
Kagetsu is fine but I usually get him into warrior. To do some strength fixing. I'd probably also lower him down a peg.
Panette. S tier. I usually have a lyn engraved killer axe waiting for her when she joins and then it's just off to the races. She starts strong and only gets stronger once you get lief and wrath on her. No idea why kagetsu got so over hyped when she exists. Marth is your delete button in the early game. Panette is your unlimited use delete button for mid and late game.
Louis a seemingly B tier unit but when paired with the seemingly B tier emblem Ike there is an unholy synergy. Slap some pure water on his cheeks and send him out there with a great axe and watch him cook. I usually start him in great knight then move him into general so he can use the silver great axe. He fights with his eyes closed and it shows in combat with abysmal accuracy, but he has a great luck growth and divine pulse is dirt cheap so he's going to do just fine even against dodgy wolf knights/swordmasterd. Give him draconic hex for his great aether and he can set up multiple enemies with debuffs without even wasting his turn.
Anna is rated too low. She joins as a backup unit when you're backup unit starved and then gracefully reclasses into mage knight. She's not great in the early game but the early game is so easy that I don't care. I usually stick byleth on her because they have great synergy. He boosts her magic, gives her some luck for procs, and divine pulse is a life saver for attacking the afford mentioned wolf knights and sword masters.
Boucheron is waaaaayyy too low. Makes me think this list is suffering from 1st play through syndrome. Great speed. Great bulk. Best build growth. Bad strength. That strength would be a problem if he wasn't able to use the highest might weapons in the game with absolutely no speed penalty and his dexterity makes him chuck tomahawks with pinpoint accuracy. Check out his stats on a stat calculator. Berserker will bump his strength growth to 50%. You keep him on that for 20 levels then move him to warrior and he's golden.