This is not a “whole new game” but it is a whole new level on the game.
I strongly agree with @zephyr1 that some of the new class traits will prove more useful than others. Revive probably better than Companion, Evade is awesome…how will you kill Kageburado once maxed huge defense that evades 1/5 of the specials you send at him? Yes, DoT but he’ll still hammer you with high attack stat and very fast mana before melting away (yes, I want him to join my team. He refused in December).
I also believe that within each class some heroes benefit much more than others. Jinx for sorcerers clearly aids the damage dealers.
Therefore, this will shuffle the deck and we will see some different heroes emphasized. I expect major spending during the Sand Challenge as Yunan looks like a supreme tank (Uclapack already proved Yunan is excellent) Now with Revive. The TANK revives!! Two healers on defense will look better too, it’ll helps ensure Yunan is healed once revived.
For the average player it will change some of the top targets and reinforce others. Magni was great, now he is relatively greater. Sartana and Isarnia both looked good and now look better, for those that have few 5* either of those two will be brilliant, most players won’t have to choose one over the other.
4* Boldtusk is probably one of the most benefited, revive, heal and buff attack… brilliant. Glass cannon Scarlett has a better chance of living another turn with Evade, Rigard will be able to cleanse and heal more often with Manashield, Little John just became scarier with additional damage…
Poor Kasshrek and Kiril with Jinx…meh. They aren’t heavy hitters making them relative losers. Cyprian’s Protect, meh, higher defense means less damage received and therefore less damage reflected.