I finished all 8 volumes of the metabarons during the weekend. The books were surprisingly bingeable, each volume ends with a hook of some sort and the length of the volumes were pretty bite-sized compared to what I am used to.
Anyways, the story felt very much like a mythological epic, following the life and deaths of the members of a legendary lineage. Some story beats do repeat a lot of "hive mind is beaten, every one connected with it died!!" , but each of the metabarons were different enough to be interesting. The art was of course amazing throughout, but I felt the lettering made me confused sometimes. The speech bubbles are often placed quite far away from the speaker, and when there are multiple people in the room it gets confusing. I was also rather confused at the sequential art for the marble accident sequence in the first volume, but other than that I had no problems following the action.
The largest problem with the series is its treatment of women. Like many mythological epics, women in the story are often little more than objects of desire (if I had a penny everytime someone gets their top taken off), or conniving hags, falling in love instantly with the main guy. But well, none of the characters are particularly "deep", which once again, fits the mythological epic feeling very well (funny thing, I am reading through Ovid's the Metamorphoses alongside this).
Overall though, I felt it was a good read with really fantastic art, executing what it aims for well. Just don't go in expecting "hard sci-fi" or something very introspective into the human condition
Edit: To add on, my favourite metabaron is steelhead