SC4 turned me off with the Creation mode, they took away from the creativity and originality from it forcing you to rely on game characters to be upgraded by the items. Or you went to Story mode or the Tower with a weak good looking character or strong silly character. Another problem may have been that the budget for SC4 was used up to get Dark Vader, Yoda, Starkiller, Three Star Wars stages filled with Star Wars trademark creations and theme songs. Compare SC3 to SC4 and the space that a XBOX360 disc or Blu-ray disc can hold...SC3 honestly had more content. They were worried too much on topping SC2's guest that they go and lease out characters whose colors you can't even change, weapons are unavailable to your using and quite frankly didn't make an epic splash in the series like Link did for the Gamecube version. In today's market you can rarely pick up a title for either system and look at it and say it's worth it's price tag. Now we're just paying for their name, or the character on the cover.
If they are going to make a step up, with an exclusion to what they have to fix to the game mechanics, fighting games will always have an unbalanced character(s),glitches, and things that just make you shake your head in shame along with a "wtf"...But we need to focus on the game content itself, bring back the real modes. The tower of souls wasn't fun, missions like "Defeat your foe before you are swallowed by quick sand!" "The rats on the floor are explosive!" The tower tried to gather this feeling but didn't.
Story isn't really that important because you can always just throw what happened to the side, follow someone else's path, push it so far ahead of every other installment people won't even bother to think about it. But I would like to see something new outside of the focus of "Journey for the cursed blade". Make some Demon Boss pop up that's going to make people want things like Nightmare around, or something that Nightmare might want to kill so he can absorb it's soul and become Night Terror, that will cause everyone to stop him. Make a new power that has nothing to do with those swords but rivals them and wants them destroyed so it can be the sole power in the world. SC3 kinda turned away from making a redundant antagonist and so did SC4...But you found most people's endings focus was on killing Siegfried at the end.
Overall I would like to see the Creation system go back to what it was in SC3, add more clothes, maybe two layers for every equipment slot. Keep the new body features in SC4 and bring back more hair. Get mission mode, exhibition theater, real artwork to be unlocked not all that cgi that I can find on the internet and don't waste the budget on extravagant guest. NamcoBandai has an extensive catalog of characters that can be ported for nothing than paying George Lucas all the money he's trying to rape back from Star Wars. And If they don't bring back custom weapon styles and just keep it strictly to styles of the main characters so what. The thing was the from SC1-SC3 they had something appealing for everyone. SC4 was just appealing to old SC fans, SW fans and pervs. I just want something that when I'm not spending countless hours of playing against friends that I can sit and play it by myself without saying "I wish they still had..."