I thought the show was great. At the end of the day it's a show about the 100th, and the inclusion of the Red Tails and whether ot not its tokenism kind of depends on if any of the Red Tails were actually in captivity with Buck and Bucky or not. If that is really what happened then I have no problem with the creators giving a nod to the Red tails being in prison camp with members of the 100th and telling a little about their story while keeping the majority of the shows focus on the 100th.
That's fair.
I think maybe it goes back to their being too many characters to follow; perhaps instead of focusing on the guy who escapes France (and I thought those scenes were good, just too brief of a storyline to really invest time into it) maybe introduce the Red Tails earlier.