Yeah, I'd rather she be a comic-only character, and a CC only character at that. But okay.
As for the rest of the show it's kind of meh for me. I think it would have been more interesting if each episode had its own plot (like ol' "Mutant X") rather than a long drawn out story running across the entire season.
I've been enjoying the Gifted but I've found Sage to be so and so. There's definately a few nods to her style in the comics and I liked the quick eye effect they used to show her powers, but she lacks stoicicism and always seems a little suprised by the lines she's delivering.
She hasn't done much though and I'm still curious to see if she'll get any further development down the line or just continue to be the tech girl.
This does seem to be a Sage that is comparitively lacking in trauma, though.