Is The Diary of River Song too Doctor focused?

I do feel its heading in that direction yeah. I think her going and seeing other Doctors is also a bit much for her character. I would have loved the Boxsets to have been about her unseen adventures between her times with 11

I'm really hoping for her to emerge more as her own character but I can't begrudge her wanting to meet different incarnations of someone she loves and I think Alex has such great chemistry with others that it's probably going to be every bit worth it to get to hear her interact with more Doctors. Personally I don't know if she was necessary to Doom Coalition but I think she's made a truly fine addition. Besides, if it helps Big Finish to convince anyone still on the fence that New Who is worthwhile by mixing up old and new a bit more, that may be a good thing too.

That's pretty much why I haven't bothered with The Diary of River Song, in case it was too much like Bernice Summerfield.

Well, we've only heard the first boxset (and got story details for the second) so it's a bit early to judge i.m.o, from what I've seen online the recent 8dr Boxsets and New Who stories were jumping on points for alot of people, McGann's presence in the first boxset certainly persuaded me to take a gamble on the first set, (whilst I'm glad I did I was never a huge fan of River on TV, though her audio stories have certainly helped change that opinion) and it's possible the same holds true for alot of new listeners, some like River more as a stand alone character, and for some her interactions with the Doctor are the main selling points of her stories, I think it's understandable BF would want to focus on the latter more for the time being as they build up a new audience (I think it's likely many long term BF listeners with little interest in New Who will skip this range anyway, but introducing Classic Doctors with the River and CD:NM sets is a very smart idea as many won't have seen or heard much Who with the Classic Doctors) but whilst I'm certainly enjoying hearing her interact with other Doctors (and I hope she eventually interacts with them all), I do hope BF balance out the range a little more and really explore how River works as a character when she isn't with the Doctor, maybe set some stories prior to Darillium.

The trouble is, if they don't have River interacting with the Classics in her own range, where would they? I've seen some listeners say they would drop the Main Range if New Who elements bled over, not all fans like all periods of the show and for some there are still very much barriers between 1989-96-2005...

I think it strikes a nice balance in not overly focussing on the Doctor. It definitely felt like it's own distinctive series and I was happy to see River taking such an active lead rather than pining for her erstwhile husband.
Oh and slight side note: Signs is fabulous! Listened with almost zero knowledge and was blown away.

I think both sets have been very good and both have demonstrated two different types of stories that involve the Doctor.

They justified the one installment with the Doctor in the first set by having him happen to be solving the same mystery as River without meeting. The second set justified heavy Doctor involvement from two incarnations with it being one big story.

Personally, whilst I thought the second set was better, I think I prefer just the one episode / story with the Doctor per set, or no involvement from him at all. I do think we will see the Doctor in the next set, and perhaps the one after, until they've got Tom Baker and Peter Davison on board.

I think so long as most of the stories in the box set feature River on her own adventures, I don't mind the Doctor showing up for an episode or two. Then again, it just depends on the story. Series 02, I felt, completely justified including the Doctor(s) in the story while still keeping River as the central character. So, really, I just want the Doctor to make less frequent appearances in future box sets. That way, when the Doctor does show up, it'll feel a lot more special.

Besides, there are a lot of other characters in the series I'd LOVE to see River team up (*cough*Benny*cough*) and LOADS of monsters I'm excited to see her face on her own (Weeping Angels, Sontarans, etc.) that I think would draw in all sorts of people.

I had heard whispers that they'd got Tom Baker on board for an episode in the third River set, but that's very much a rumour for the time being. Presumably the set has yet to be recorded.

It doesn't seem like an impossibility; they've got him for a Classic Doctors, New Monsters episode.