In case we don't get around to it, I'll document my main concerns:
- Unintuitive and easy-to-miss buttons. (e.g. having to scroll all the way to the end of current statements to add a new statement; having to click edit be shown the possibility of removing)
- No mobile editing except labels. It is impossible -- or at least I completely failed to find how -- to edit/add a claim on an item in mobile view. I am forced to switch to Desktop view to do any editing beyond labels.
- autocomplete sometimes doesn't happen; perhaps it's just network issues, but it would be user-friendly to have a key combination or button to *force* auto-completion right now, or force a re-try in case the automatic one went idle forever.
- Additional suggestions of properties based on statistics. It seems Wikidata runs out of properties to propose at some point.
- A way to dismiss a suggestion -- e.g. "date/place of death" for living people: I want to be able to dismiss it as irrelevant once and not see it suggested again, if not ever, then at least for, say, 90 days. That way I can keep looking at *relevant* suggested properties to add to an item I'm describing.
- Some indication on how to customize the label/desc box. It is far from obvious that the User's babel box controls it, and far from obvious what a babel box looks like, for people who have never had one. Indeed, it would be best defined as a preference rather than (or at least in addition to) a babel box.
- Useful gadgets like "statement filter" enabled by default.
- More visibility for constraints on property values when actually editing an item. It seems most validation is done post-factum, but it could save work and educate contributors if there were some visibility for the existing constraints *in real time*.
That's it for now. :)