Shame. Hope he's doing well. I know he's regarded as one of the best, if not the best, writers for BL. Apparently there's all kinds of bureaucratic issues at BL concerning Abnett and other writers, so I wouldn't be surprised if they're pissed at him, but I know nothing about that stuff. I've heard only good things about Gaunt's Ghosts, however, so those are on the short list too.
I only knew the first one came out long after the fact. It is actually really strange since I would think they would be exploding with joy over another Abnett inquisitor series, but it is possible that Abnett has told them he is leaving (he DID have the epilepsy issues a year or two back and his Marvel and creator-owned careers really took off) so they are trying to focus on their other talent. In fact, come to think of it, they also barely promoted the latest Gaunt's Ghosts book. So yeah, pretty sure BL is pissed at him for something or another.
Ok, that's what I thought re: Bequin's presence/mentioning in Ravenor. Given that it's the grimdark future we're talking about, I doubt there's going to be an overly happy ending, but I just want the story wrapped up. Looking forward to Ravenor, especially if the writing is better (less campy combat dialogs, etc).
Err, to answer you question: she is a presence in Ravenor, but she was really Gregor's love (her and Gideon were just friends), and Ravenor kind of has other stuff to deal with. It is unclear exactly how the Bequin/"Eisenhorn VS Raveor" trilogy is going to work, but the viewpoint character is a pariah who is referred to as Bequin, so yeah :p
Of the two existing trilogies, I prefer Eisenhorn conceptually (a good man being turned into a Renegade), but Ravenor has much better writing.