MArcomage

I guess it should be the date of last actual deck change - token setting, card replacing or resetting, right? But now it changes after you finished a game playing this deck. Either field or functionality should be changed, I guess.

Last change is updated each time your deck score changes. The idea behind this field is to provide a way to identify deck that wasn't used or updated for a very long time.

Can't this field be splitted? First date - last play, second - last actual change.

Why is it necessary?

I always thought it was the last time I made a change to the deck. As it stands now, it's misleading. It should say "Last used" if this is the case, but I'd view (an actual) "Last changed" as more useful so I can see what decks I haven't reviewed since the latest updates.

Seems reasonable. I'll try to add it to upcoming update.