Here are five usability issues, which would be quite helpful (some are probably already mentioned in other threads):

- for books, potion etc. offer additional button "use now", now for each book, potion etc. the item is stored in the items list and then needs to be activated their, this is most of the time quite akward as you want to use the item directly.

So two buttons "use now" "keep for later" would be much better

- remove all events for one type via right click on the grouping icon

- Direct access to research screen via click on progress bar in main screen

- the same fpor spell research

- provide a quest book with all currently open quests and maybe some stories to fulfilled quests

Those are just my five cent.

Sincerely Sparhawk4242