I thought of one
Making the missions better,they'r honestly really simple and don't really give out much of a storyline, if there was these very complex and long missions, I think it would make the game better...
Ex:
Chase the black-hooded hatchet
After successfully catching him, talk to him to get the information of who he works for
He won't talk unless you defeat 20 green bouncers to see how powerful you are
He thinks you're so awesome and pro (nub) and asks for mercy, you get the information of who he works for but didn't give the location, as he leaves, he drops a piece of paper
Huh, you think, maybe this will lead me to the hideout. Find 7 pieces of paper around the world (aka simple places...)
Once found, it will reveal an area of the map (which you couldn't go though before)
Once inside, black hooded people be there, and to prove you may pass to the next area, you must give them 7k
Fight through a pit of monsters and reach the next area
You find a guard that's actually loyal and won't let you in unless you have a costume
After having all necessary equipment pieces, he let's you in
Inside, you find a big hideout with shops and find the leader, mad Ricky
Hey, you find out he was the one that sent the hatchet guy to kill you, so you decide to assassinate him
Gather 10 wood and 10k gold and a wooden spear to build a ballista (Ik, weird)
Place contraption in certain area, oh no! You realized you needed a rope
You find a cult who would like you to do this, so he offers 8k for rope
If bought, you can fire the ballista, so you fire, and it hits him and he dies, people see you as the new leader and shops and side-quests are open
Or did you kill the real Mad Ricky?...
Dang, I really liked typing that
Oh, it's there? Well, at least I gave a nice long and enjoyable quest example