I learned this the hard way also. I am quite used to three starring mid level and below TH 10s with GoWiWiPe and then all of a sudden after the update, the next war....I am barely clearing 70% on my next two attacks and my Pekkas are just not making it thru.
I had to rewatch the plays multiple times before I figured out why I was in the core so much longer than normal and what had changed.






