That would've made it much better...

[Karifean]

What extra features would you have loved to see in this game? Mainly gameplay-wise, you can complain about the story somewhere else...

Personally, I'd have loved the ability to switch out the character you're controlling during battle. Either that or being able to contol all fighting characters at the same time. Or being able to design your own AI for the characters. Any of them would've done.
Also, multiplayer would've been nice. 3 players each taking control of one character and together beating the sh*t out of a Long Gui would've been fun. And I would've loved to fight against another player as well.