Basically, I enjoyed the show, but I feel that it was one of Marvel's weaker entries. The plot often felt muddled with character motivations requiring a large suspension of disbelief. It also frequently shifted its tone with some parts going for comical and downright campy to others attempting a gritty, mature-rated feel in reminiscence of the Marvel shows on Netflix (which are still the best Marvel TV attempts). All the way to the end, I did not understand why characters did what they did or acted the way they did.
While Alaqua Cox did well in the titular role, it was Vincent D'Onofrio and Graham Greene who were the real scene stealers--and who did not have enough screen time. I was also happy to see Tantoo Cardinal again, especially with Graham Greene. I loved their chemistry in Dances with Wolves, and it was nice to see that same spark again when they appeared together here. Unfortunately, many of the other characters felt underdeveloped. With only five episodes in this season, and many of them quite short, I suspect that there was a great deal that was left on the cutting room floor as Marvel through Disney has been making course corrections to its approach to the MCU.
With Daredevil: Born Again pushed back another year due to a complete change in the shows direction--including the return of the other actors/characters from the Netflix Daredevil series--I'm hoping that the next time that we see Echo, she will be a little more firmly rooted.