Personally, I liked it. It was a little implausible at times, I will admit, but it was one of my guilty pleasures, being one of very few shows that actually required my full attention from beginning to end. Most of the other shows I watch, I can have on in the background and listen to while writing or doing chores. I also especially love seeing people of color on television not playing subservient roles.
Per eurweb.com, "The jet-setting is over for NBC’s spy drama “Undercovers” and its star Boris Kodjoe.
NBC announced today that it will not pick up additional episodes from the freshman series beyond the original 13-episode order, according to Deadline.com. The Warner Bros TV-produced show is currently filming Episode 12.

The series will stay on for the next 2 weeks and will air its last original (for now) on December 1, reports Deadline. It was already set for preemption on Nov. 24 when NBC is airing a DreamWorks Animation holiday special. The fate of the remaining original “Undercovers” episodes is unclear.
This is the second new NBC series to get cancelled, along with legal drama “Outlaw.” The rest of NBC’s freshman class all received back-nine orders two weeks ago. At the time, “Undercovers” got a pickup for four additional scripts."
I'm not in marketing or anything, but I do know that networks copycat each other. They see what works on other networks and they come up with their own versions of those shows (like The Event being like Lost and 24, and every sitcom and cartoon that has featured a fat dumb guy with a lean smart wife-- like According to Jim and King of Queens). They also see what doesn't work (in this case, dramas featuring 2 black actors in the lead roles) and they avoid the idea altogether.