I guess personally I was ok with Superman being basically equal to the rest of the teams might and have no issue with this. He could have solo'd Steppenwulf I agree...but he could not have saved all those people or maybe even stopped Steps plans. I think the message was...no matter how powerful you are...you still need teammates and support and that Superman the most powerful of them is the one who actually understands this best (they brought him back for raw power).

As to who would win...agree with almost everyone on Thors insane last movie showing durability....for most part...tazers seem to be his kryptonite ;P

IMO Supes wins this...not because he is overall more powerful then Thor...but due to his insane speed levels and equal level of durability. I was amazed when WW went to pull out her ace in the hole attack that messed up Ares and Supes just zips up and stops her from clicking her bracers together.

If supes doesn't use his super speed and Thor uses his lighting...definitely Thor wins though.