Other than the vertical movement complaint in the original, I just want Soul Sacrifice delta to add lots of new weapons, maybe some hybrids, like a magic staff that can be used for melee attacks or mid range elemental spells, melee weapons with different aesthetics (small sword, Large 2 handed, dual wielding etc..) and different movement animations (slow, fast,rest the weapon over the shoulder, etc..). I felt melee weapons were underused in the original (I only used them in the beginning and in the final boss fight).
If they want to, the game can have much more depth , and I hope they are planning to do that. Also add a dozen or so costumes (not color variants ) ^^.