Have Arcade remember your last customized avatar.

[Own]

When you confirm a Custom avatar in Arcade, have it remember that avatar and keep it's settings pre-set for the next time you select Custom. If you want to change it you still can, but remaking the same avatar each time you go into Arcade is a tiny bit bothersome.

 

[The G-Meister]

Or better yet, have a system whereby you can store up to like 3 (maybe 5) character designs which you can then quick select from a menu. Maybe give the option to edit them, change the name, and even a small battleground (possibly the arena) where you get a couple enemies to fight to see how they look in combat... Or instead have the more simple option to show the fighting animation in the character creation window.

How does that sound?