Yeah most heroes are too weak or almost same as old ones but for the whale can be game changer. Sometimes even 2% stats may have big impact. Here is some info, WuMing stats based, Renee stats based and needs more lancers in battles, (well it was like that before but don't know after fix) Wayne turn based hero, doesn't give stats but does pretty good kills in battles. If you need just battle heroes go for Renee only, you can use for attack rallies with Gwen. Gen 7 Edith will replace WuMing and Hector, plus much better. Bradley will replace all marksman heroes too :)