I actually thought what was done with Claudia's exit was pretty true to mob life, and a daring thing to show on a soap. The problem, as always, was that the entire show angled around the mob and misogyny at that point and treating Sonny and Jason as the heroes at all costs - what they did, what they'd raised and driven Michael to do and forced him to cover up, was all good drama but it retained them as the stars of the show with a moral compass largely absolving them. Until Guza got bored with her there was an attempt to make Claudia a tragic, flawed hero too, after getting a kid shot in the head.
Yes, supposedly they'd planned to reintroduce a few Soleitos and maybe Carla. It never happened.