I just finished watching the season, I really liked it! I do agree that a lot of the animation/framerate issues faded away after a few episodes, and the writing is good enough to keep me invested. I like that it seems like this series is going to take its time at dealing with the final threat. Legend of Korra dealt with a new threat each season, and I would argue that came to the detriment of strengthening the characters. Dragon Prince seems to be taking a note from TLA by moving slowly with the plot, and it's already paying off by deepening the characters.
Ezran, Callum, and Rayla are the main characters of this story, and they are all pretty well cemented. I like how Ezran is still this goofy kid, but you can tell that he's got a lot of good qualities to be a leader. He's extremely perceptive and critical, and he works great as an arbiter. Callum is voiced by the same actor who voiced Sokka, and while I may be a bit unfair here, I simply think of Callum as Sokka's reincarnation. Finally, there's Rayla, who I would argue is the most complex of the trio so far, and I love her voice actor. She's got a self-imposed serious streak to her, but she's also got plenty of funny scenes. She's also a fan of Naruto.
Most of the antagonists seem interesting. I like General Amaya a lot--although I admit I'm a sucker for shield-bashing badasses. She's obviously extremely determined and has a vicious streak, but also caring. I liked that she didn't always have her translator voice out everything she signed. Claudia and Soren are a good duo with plenty of funny scenes. We unfortunately don't get to see enough of them for me to form more of an opinion, although I'm pretty sure that we'll get more in the next season.
Lord Viren is a bit of a mixed bag for me, honestly. There are times where we see flashes of humanity in him, but a lot more often he just seems a bit cruel and vicious because he needs to be. I'm guessing he' actually terrified and desperate, but it so far hasn't been fully confirmed. I can't help but think he's just power hungry, but his moments of compassion seems to be hinting that there's more to him. Also a lot of his interactions with the other adults in this show has a severe case of whiplash, going from extremely hostile to amicable to extremely hostile in the span of a few minutes. It left me scratching my head more often than not.
Finally, I would say that this season ends a bit at a weird spot. It's a soft cliffhanger, although I would argue it's more like they ended the season at a midpoint. Maybe the writers were told to end it that way, or maybe it's because they're expected to have six or seven short seasons instead of 3 long seasons. None of the less, they got a lot of ways that they can develop the story, ranging from character interactions to world-building. I'm excited to see what they come up with next.