Wasn't a fan of the season in general. Not so much a casting problem, but more plot. Poe vs. The Reboot was a better plotline than Tak's stuff overall. The payoff for that sorta stunk. Will Yun Lee running around now gives me hope that he gets a season to himself. Always liked his work. Hope he ain't completely written off.
Didn't have a problem with Anthony Mackie. Though Lela Loren was mis-cast. Probably could have found a meaner bitch. Coin toss on Simone Missick. See Neal McDonough in the post above. Salli Richardson-Whitfield directing the last episode and sneaking in for a cameo was cool. She's been doing some good work lately.
I think a new showrunner and being careful with the cast will make season 3 great. Don't know if it got renewed.