The camera to follow me a little bit better, specifically when I jump. I find myself halfway off the screen most times when I'm attacking in the air.
Weather is nice. Weather that affects the environment is okay for the most part. Weather that affects that environment and forcibly moves your character / prevents movement of your character? Punch whoever thought of that in the face. Looking at you, Forest areas.
I want to buy a hundred vita canes (example) without having to click six times for each individual cane. Select item (1). Select item again in personal shop (2). Purchase (3). Are you sure? Yes (4). Would you like to send a kudos? No (5). Back (6). Streamline that. Holy cow.
Let me just... turn off ALL the particle effects. I can't see. Anything. Ever.
More keyboard shortcuts. Maybe I just missed it somewhere but I seriously need a (modifier)+(button) to mute game music / sound effects / master volume, etc.
Can adjust camera height / distance, but always reverts back to default. Make it so default can be changed to whatever you want.
I'm sure I'll come up with more. This is just off the top of my head from the last couple hours of doing stuff.
Less screen clutter. Half the time I can't see, not because of crazy particle effects, but because of all of the screen prompts. EMERGENCY! AI AUTO CHAT! COMPLETE REWARDS! ARKS NOTIFICATIONS! I'VE GOT GREAT NEWS! MULTIPLE SIGNALS, BE ON YOUR GUARD! And on and on.
Monster density. Everything should be as dense as ultimates, because otherwise it's boring running around killing a couple of baddies at a time. And on that note, emergency quest spawns need to be increased or spawned all at once or something. KILL 5 THINGS and then waiting for them to spawn and jump down one by one is boring.
Or how about EXIT TO CHARACTER SELECTION. WHY DO I WANT TO GO BACK TO THE TITLE SCREEN AS AN OPTION.