Sorry...I don't like it
If you lose a battle you have to go back to the main menu from where you have to load the whole level again. No possibility to "Retry" like in Budokai 1, 2 and 3.
If you get stuck into Battle the enemy always sometimes uses the same attack so you're not able to get away from him. If you manage to get free he always uses KI-Blast or Special Attacks to bring you down.
...Budokai 3 was MUCH better.