Hi all,
I have two suggestions today for arena improvement.
1) Since all characters are lv 100 in the arena and it is suppose to be a level playing field for everyone, I believe that all skill should be available for players to use. Especially now that arena has its own separate talent list, there is no reason to not be able to test skills that would normally be above your level, at minimum in the training fight, at most in training and ranked.
2) Since there is now a training mode and every time you unlock a character the little window pops up telling you to go to arena to try out new formations, I would like to see the training battle arena be more like the simulator on here, where I can select any main and talents to use to try out my new characters instead of having to switch mains and commit for a whole day just to try out a new formation and see if that new character is worth using at the time. For example, I currently use water main but just pulled a Darui, it would be nice to go to arena and switch to lightning main to try him out in my old root/mifune team and see if I like it better than my current water team.