You're forgetting quite a bit of what we've discovered (and how it expanded on what we knew from before CH4.
The family split into three: Tony (who isn't talking to his brother) and the sister (who's name I forget, but it starts with a J, and who doesn't talk to Helen). MC's leaving dealt a huge blow to the family's prestige as well. Their main enforcers were Uncle Fred's MC gang that's been dispersed since he was sent to jail. There's apparently been losses in battles with Krayts and other families. The Wollust Zanes are at a low ebb and are laying low until Fred gets out in a couple of weeks, and they can rebuild their base.
Helen is only the deFacto boss. Dylan is the Zane, and official head of the family (in Wollust, at least). Helen just has the balls.
Leia is fucking everything up for them by doing her own thing and attracting a lot of attention. She is NOT doing this as a Zane thing, it's her own thing, and she's taking over Fred's business to do it. It looks like Emilio and Rinny are hers, and not Joes, and they've both been describes as fanatically loyal to her. She may be trying to re-establish her old family (in this new iteration) or maybe she is trying to just be independent, while being part of the Zanes. Time will tell.