I've watched up to episode 7 so far. It seems like overall the quality has really taken a dive compared to the first season. The show is more melodramatic, it's trying way too hard to have attention seeking "look at this!!" stuff, and I find most of the new subplots and characters to be lame and uninteresting. The highlight the series remains to be watching Frank and Claire as characters. They're interesting and the performances are very effective.
Out of the first seven episodes I'll say the ones I really liked so far are episode 4 and episode 7. The show operates best when it's about quieter moments with the characters interacting in private settings where their guards are lowered and their humanity is allowed to breath. Most of the other episodes have felt rather forced, with some really mediocre stuff storywise.
The entire cyber-terror subplot is stupid and plain awful. Something I expect to see on cheap network TV stuff, rather than on a supposedly more prestigious pay channel series like this. The Chinese stuff is really annoying for me too, since one of my pet peeves is how fake and unauthentic it is when a production tries to pass off American Chinese actors as native Asians. It never works because it's always really obvious to those familiar with the differences, and it throws any immersion out of the window instantly.
I don't really know what to expect from the remaining half of the series, but I can say that my expectations have been lowered significantly now.