Hiho,
I have one minor and two major points:
i) Minor: When browsing through the version history, I think the status of that version should show.
ii) Major: Currently, when there is a quality version, this overrides a younger sighted version. This is not as it was planned and since quality versions do not scale, this would lead to readers seeing usually rather outdated versions of articles. I think that the value of quality versions is mostly as a tool of going systematically through our article base and for those who want to reuse our content. It might be, that for example WikiSource or WikiNews might find the current setting useful, but I don't think that this is a good idea for Wikipedia.
iii) Major: When the current version is sighted, an IP still does not see the edit button. This is a major restriction for IPs and is factually something like "IPs cannot edit here anymore". While not fundamentally opposed to this, this is a very deep topic and it is in my opinion not this extension that should answer this. Either we do not want IPs to edit, than we should shut them down, but please not via a backdoor from an extension that is about different things. So, please make it so that IPs see an edit button when the current version is sighted.
Bye,
Philipp