DNSSEC key rollovers don't change who has custody of the keys. They're not a magic spell that fixes stuff like this. It is closer to the truth that DNSSEC is limited to recovery from incidents like this to doing rollovers, rather than immediate revocations. Rollover is not something that makes DANE more attractive here.
I don't think I understand what you're trying to argue here; if you can't find a usable registrar for your domain… you can't really use that domain anyway, can you? They can just break it. But… let's not get into yet another DNSSEC/DANE discussion.