My feelings on Season 8 are pretty basic. I feel exactly the same about it as I do the show.... and that's a big problem.
Why? Cause we are now, what, 9 years removed (in universe time) from our first introduction of all this and it still feels the exact same. I mean, how many times are we gonna see Xander deal with a sense of uselessness before he stops feeling useless? How many times are we gonna see Buffy feel "all alone" before she stops feeling so alone? How many misogynistic bad guys are we gonna see before the writers stop using misogynistic bad guys?.... and so on. In years past, this stuff was fine, cause it was new and fresh, and certainly against the norm for TV at the time. Today, in comic book form, for an idea that is running on for years, it just feels repetitive.
What I am trying to say is that there seems to be very little forward momentum as far as characterization is concerned. And it feels like a lot of characterization decisions being made by the writers are being done more so for plot and thematic reasons (Xander/Dawn, Buffy/Satsu) than for any discernible character motivations. Normally, I am ok with such outcomes as I feel that themes are more important than characters, but the plot and tone being pushed by these character developments are so ridiculous as to be unworthy of such aspirations.
The real strange thing is that, much like the TV show, I actually enjoy what appears to be the main theme (the end of an era, magic in this case) and the plot they've tried to weave into it. The problem with the comic is that it feels, at times, almost choked by the back story of the show. Having Xander and Dawn together serves a useful friction point on the eve of an important battle, thus it works as a useful dramatic device. However, it is largely out of sorts given the history of the characters involved. Same with the Buffy/Satsu pairing. If these things were able to be stripped of context, I don't think people would be nearly as annoyed by them as some have been, but you can't remove the context and thus creates the displeasure with the comic.
As for Twilight specifically, I remain convinced his identity will end up being a complete swerve. In fact, I wouldn't be surprised at all to find out it is someone we don't actually know at all. I could completely see the writers, in keeping with the theme of the outside world suddenly being unhappy with the magic world, that Twilight ends up being some obscure, never mentioned kid from Sunnydale so upset with Buffy that he sees the end of magic (and Slayers as well) as his justice for what happened. Why not? Makes as much sense as the goofy "Slayers out, Vamps in" nonsense.
I think a lot of how the comic ends up being viewed, once in complete form, is dependent upon the next two issues. It seems fairly certain, at this point, that by the end of the Retreat arc Twilights identity will be revealed and probably at least one major character will die. If this is well written, the comic may turn out alright in the end, if not, it will tank. Sadly, I think they've come to this make or break point with it.