Reghabi still barely exists as a character
By far the most underdevelopped, yet most important to the plot character in the show is Reghabi.
During S1, she appeared mysteriously to help Mark, which made sense contextually, and they didn't have to develop her character right away.
But now we're late in S2, and Reghabi is still only a walking plot device.
She shows up whenever and wherever the plot requires, to only do whatever the plot requires, and nothing else.
Who is she? Does she have a life? Is she ok just hanging out at Mark's house all day?
Character development goes beyond background information and lore drops. I'm not asking for a sweet vitriol for Reghabi. I'm asking for her to have personality, relationships, to interact with the world, to exist outside of specific plot points.
It is becoming too easy and too obvious for her to not be developed as a character, and only exist as a plot device. And some point they should have fleshed her out and make her feel more like she's part of that world, and not just part of whatever Mark needs at any given moment.
Edit to adress 80% of the replies which are "but S2 isn't finished", "wait till it's over" etc
It doesn't matter that maybe it'll be shown later. It could already have been shown, there was plenty of time. It would have been better story telling to develop her over time, as her character gains more importance and becomes more central to the reintegration plot, compared to awkwardly developing her after the fact as an after-thought.
I've already seen her as a plot device lacking character, and that has already made that part of the story worse. It's done. That has happened regardless of what's coming later or not.
A story can be evaluated before it's finished. I can already say that S1 had better story telling and character development than S2, regardless of how both seasons end. A story can't only make sense at the end.
And an ending no matter how good it is, doesn't retroactively make bad story telling good.