***Full Review***
Be aware of the reviewers softly criticizing the TV show yet, proceeding to give this show a 5 star rating. These are bots/people with incentives to boost the show's ratings/subscriptions.
Story:
Generic story using the Halo title. The series could have been okay without using core canon characters from the franchise and better writing. 117 comes off as always bothered. Each scene without the helmet, he has the same snarky expression. Being advertised as humanity's savior, hardly feels as such. Then there is Kwan. The writing for Kwan is poor which leads to other issues with the character. Also, this show heavily touches on time travel, fate, chosen one, etc.
Key Plot Mysteries:
-Select characters appear to call the thing that is unknown a halo. One character knows it's a weapon, while two characters 'visit' halo. All before actually discovering halo.
-Weaponry used by rebels has no effect on Covenant forces; the same weaponry used by Spartans does.
-An emotional regulator in Spartans (pill) appears to suppress human emotions. Once removed the Spartan awakens. This is debatable with our current understanding of emotions.
-Soren mysteriously appears back on Rubble from Madrigal, without any clear conclusion as to how.
-Tribe in Madrigal seem to possess the ability to send hosts through time and create simulations. The host consumes an unknown liquid prior to these experiences.
-Dr. Hasley orders Silver Team to bring 117 and Makee in alive. Vannak confirms the mission during standoff with 117. Vannak proceeds to order Riz to kill 117. Mind you, Vannak is 'programmed' still having the pill.
CGI/Props:
Questionable CGI choices such as the assault rifle being thrown onto the ground & cardboard plasma pistol. Kwan drove through a sandstorm without face and eye protection. The vehicle appeared stationary while "driving" and the braking had poor effects. There are slew mistakes with props and poor CGI throughout the series.
Budgeting:
It's clear that budgeting issues may have existed due to having a human taking the role of the Covenant head. This leads to minimal interaction with the Covenant aside from the few battles and aftermath visuals. The sets appear to be generic and uninspiring. Other props such as legacy weapons/vehicles used over 500 years into the future attempted to be excused by reasoning that rebels/colonies get hand-me-downs. Over 500 years into the future.
Halo Universe:
The show does not sell itself to be in the Halo Universe. The UNSC appears only to be a hand few of Spartans, marines, officers, rebels, and Dr. Hasley. Each location, the same core canon characters are conveniently located together where they need to be across different areas. Relatives appear to work closely together in the same chain. The positions that the characters hold does not give off a strong sense of military authority. Since there is a human head of the Covenant, there isn't much presence to sell the idea of the Covenant posing a major threat against humanity.
Positives (Subjective)
Though the story is poorly written on all accounts,
-Soren is pretty cool.
-Silver Team dropping in at the beginning was cool.
-Dr. Hasley actor actually tries.
Vannak doesn't sell it to me since I can clearly see how Paramount is trying to set up a sharp contrast in a more aware Spartans without the pills.
Summary
Unwelcoming changes to core canon characters, poor writing, and predictable plots lead to a very poor series. Even with the "expanding the Halo Universe" in mind, I still ask myself:
"What is the point of this series?"