Yes she is a main character, and her healing as talking is more than any other girl has done in the k11 and most boys, she has done things in part2 that are worthy mention so i think her surpassing Tsunade will do something for her it may not redeem her in the eyes of the people that will hate Sakura for everything but that doesnt matter. She had to take on the role of a medic and that goes for all its rules if she was going to come up under Tsunade just like oro to sasuke and jiraya to naruto so when it's her time to shine I won't be disappointed because her becoming a medic, you can't make her go around fighting everyone.We all know that its not the problem she is supposed to be the heroine of the manga and she is NOT also she is supposed to be one of the MAIN CHARACTER and we don't see her doing a thing then just healing and talking and very few panels with her
All in all Kishi failed with Sakura as a character , yes she will surpass Tsunade maybe even help tnj sasuke.... that will not make up for the redemption of 616 chapter's of her
Sakura fans are in denial.... beauty and cuteness does not make a MAIN CHARACTER or a Heroine
She is not even a support character at this point....
But anyway healer = fodder to everyone apparently