Hmm yeah, that definitely seems possible actually. Surely the writers must know that audiences would like to see more personal connections being build up among the regulars, especially after the audience fuss at the Alicia/Kalinda friendship being written-off, and yet they still haven't bothered to continue Alicia's bonding with Cary or Diane from season 5. Also I believe that the King's actually acknowledged that nothing happened with Finn because Julianna didn't want to go there, and they made a point in interviews of Julianna approving of the casting of JDM as her love interest. It doesn't necessarily even have to be about her being awful to work with, but she does seem to have an awful lot of clout on set now that she's an executive producer, so I could see her having her own ideas on preferring to keep Alicia independent and working alone. I wouldn't even object to that necessarily, but there is so clearly no idea how to integrate Diane and Cary with Alicia's storylines :(

ETA I guess the risk of getting your main actress heavily involved in the decision making is that, from the second half of season 6 onwards, it felt like the focus was very much only on what was best for Alicia's character, and everyone else was being treated as afterthoughts. Diane for example is only getting an occasional showcase episode thrown her way as a bone, rather than being an important part of the narrative these days. But then, to be fair, actors are naturally going to be focused more on their character and what they'd be interested in doing, it's the people at the top that really failed to keep the focus on the supporting cast and the show as a whole as well

And the recent scenes with Sheldon and Amy were adorable, I can't wait to see where the show plans to go with them once they're back from hiatus :)