I have played this game for about 60 hours now, and I have yet to finish the story because I do other stuff like quests and alchemy. I do have some major problems with this game.
How come I can't take the alchemy pot with me on my journey? I have to zoom all the way to Stornway, get inside the inn, talk to the pot, and now I can start doing alchemy. Either only allow me to use it in any Inn, or just let me use it on the go.
How come I can't sort the recipes in order of readiness. It's so tedious as it it right now to go through all the recipes. I would have it so that at the top of the list are the recipes that are ready to be done, then the next recipes are the ones that are almost ready but you have to take off equipment to make them ready, and the last recipes are the ones that you obviously need to collect more materials for.
I have to memorize the location where I can mine for materials? Remember how the Legend of Zelda games for DS introduced the ability to write notes on the maps, and wasn't it great even though there isn't much to remember in a LoZ game. Sure would be quite helpful in a game like DQ9.
Also having an auto-sort option for the equipment menus would be great.
Also I don't mind the grinding, but it would be less tedious if for every battle I didn't have to go through a screen transition every time.
Edit:
I for got to say that the level of customization for this game is good, but I think that in the end it just becomes a game of "equip the best stats" rather than "hey I like all my characters to run around in boxer shorts" kind of game.