Gladius is by far the best arena frames addon out there at the moment. However, there are a some things that one is not able to change, which irks me. The following are the changes that would make this addon the perfect arena frames addon:

1. Specify the distance between health and mana bars.
2. Change the height of any bar below 10.
3. Change the background color behind the bars (eg. completely black rather than translucent white).
4. Option to color any bar by class or any custom color.
5. Option to color any text by class (eg. Name).
6. Ability to choose different fonts.
7. Ability to size texts differently.
8. Have the option of padding behind each frame (eg. to make a border).

I realize that some of these requests can be easily changed by editing the .lua, which I have done, but others are a bit more difficult as I am new to lua; however, it would be more beneficial for them to be deployed by the addon author.