I generally never play seasonal but decided to give it a try because of the journey quest that recquires you to finish five matches in this mode. And what can I say, Battle Rush is just absolutely amazing, especially if you don't have time for a regular match of Gwent or simply don't want to wait for your opponent that long to make his or her move. It's also incredibly convenient for people who just want to collect the crown pieces for the journey. I know this could make it somewhat less special as it would be available all the time instead of only a month or two, but I'd really love to play this more often.