Wrking with my UI i encountered the same problem - arena frames were very basic, mostly because i don't pvp much.
Hence after the request of improving them, i found myself in need to write down the code from scratch for preparation arena frames.
really hope for a future oUF support, that would make things a lot better
![Wink](//cdn-wow.mmoui.com/images/style_mmoi_wowi2/smilies/wink.gif)