If you want to have more informations regarding these changes, you can read the staff message (in english) here:
http://www.urban-rivals.com/en/community/forum/?mode=viewsubject&id_subject=2694320
Please delete Dj Korps semievo, and exchange vs protection should work as copy, for example El Parasito vs #Valhala both cards should have 6 dmg, otherwise you can't have a solid deck, all you can do is play some cards with good stats, some exchange and some cards with bad stats and good abilities and hope you get a favourable hand