Sorry if i am too direct, but this is the worst update possible, and we need a way to disable it, if not fully revert.
The rationale is pretty simple, the data visualization and insertion is clunky and hidden behind too much interaction. The previous version worked well because one could see what cards one had, right away without clicking anywhere, and add cards with one clicks. Now not only everything (both addition and visualization) requires one extra button, but the interface is unusable as the rest of the screen is blacked out and non-interactive (like I forcefully need to exit before I can click on the button).
Deckbox was renowned for its simple but effective interface, please keep it that way.
Edit: reading comments above, if this is a performance issue (land cards performance a problem? seriously???) consider keeping the old interface for premium customers - right now this website is unusable for me
Edit: Edit: the plus button overlaying the quantities (see attachment) is the worst