These books overall are still going strong. Harbinger is great, and probably pays off even more for fans of the old series (that's probably true for all the titles), but even as someone who has never read the old series, I'm enjoying it based on the stories alone.
Archer & Armstrong is a lot of fun. It seems to be a love it or hate it thing concerning it's readers' opinions, but I'm enjoying it. Bloodshot is an interesting and still fresh take on the whole antihero type character. XO is probably my least favorite, though still decent title. Shadowman is still only a few issues in, and I'm admittedly not sold on the tone and approach, but given the quality of the other books I'm willing to give it a bit to let the story and characters develop.
The upcoming Harbinger Wars mini seems like it'll be interesting. Loving the approach the editorial team has taken with the universe in general: letting the writers tell their stories, but still shaping a cohesive and well-planned universe.
I'd definitely recommend checking these books out, would love to hear the opinions of my fellow board members.