I don't have a problem with Scanlation groups dropping a manga if it has become licensed.
If you do scanlating for free, then you have my thanks. But the moment you start taking donations and money is the moment you should be held accountable. Just look at Youtubers. Most have a Patreon page with clear goals, and release schedules if certain donation levels are reached.
Correct me if I'm wrong, but does Zeonic do this? Browsing their site, I only see a donation button leading to Paypal. I see no page that telling you how much has been raised so far. No breakdown of where the money goes, or general schedule of release.
I've seen some shitty Scanlation groups that take people's money to but keep everything secret. They release slowly, ban anyone who complains about the slow release schedule, and deny info about where the money goes. They treat it as though it were still a hobby telling people "lol you guys are lucky we are doing this at all".
Now I don't know the full history of Zeonic, but is this true at all? Because if it is, you can't have it both ways. You can't have your cake and eat it too. You're either a hobby scanlating group, or a pro-group.