What would I like to see? From the ground up:
More Character Customization options. I want to make a Dog-person, or a Dragonman. I want to make a fat female Majin, and a non-fat male Majin, and maybe something in between. I want to make a dude(or a lady) as big as Nappa or Recoome. I want to make an alien like Burter or Dodoria. I want more clothing options. I want to make minor adjustments to my character without having to find the freakin' Dragon Balls. I want less clothes restricted by race, and if possible, stuff from any other Toriyama works you can get your hands on. I want non-Saiyan transformations, and if at all possible, the ability to play as an Oozaru and/or giant Namek. And cool it with the hidden effects just a bit. If I want to make a small bruiser or a big blaster, don't penalize me so much.
Oh, and I want to be able to choose the color of my Aura/Ki blasts. Maybe their shape, too. In fact, give me some options to develop my own Super and Ultimate moves. Nothing too fancy, just stuff like Beam vs Ball; One-handed, Two-handed, or Double-handed; charge times, additonal effects like immobilization, maybe some movement options too. As I level up, I can gain a higher "power level" that allows me to gain or stack more effects.
Training: Part of this goes into customization, but in lieu of/addition to simply asking to be able to choose or change my fighting style, I'd like to be able to gain a character's throws and basic attacks/combos when training with them. Yes, there can be restrictions, like only Nameks and Majins being able to use stretchy moves.
The City: Make it bigger, and give me more options for moving around. Don't give us a piddly little hop that can't even jump over a damn bench. Let me fly through the city and visit those platforms. Let me buy a vehicle (like a Space Pod, Namekian ship, or one of Bulma's many, many aircars) or a house.
Combat: For various reasons Xenoverse was the first(and only) DBZ game I ever really played, so I can't compare how it was against Budokai, Raging Blast, and the like, but even I could see it needed a little tightening up. On top of that though, I have some more suggestions:
- I'd like to have a way of gaining the upper hand in a clash.
- I want destruction to be more extensive and permanent. I wanna put Freeza and his goons through a mountain.
- Better gross aim correction on supers and ultimates. Even if a shot misses, it should always be at least in the enemy's general direction unless they Instant Transmission-ed/flash stepped at the last second.
Missions: Please ease up on the Random Number God. You don't need to trick or force us into playing the game more. The latest Monster Hunter game is giving players an out by allowing them to substitute large numbers of common drops for rare ones, but that's just one option. How about automatically ticking up the drop rate a bit each time a given mission is played consecutively? or giving us a luck stat that adds to that rate? And ease up on the marathon missions and "X must survive" escorts? Or at least allow us to use our items on them. Also, can we just straight-up get character clothing as full sets instead of one piece at a time(and hope it's not a part you already have)?