The only actual issue I can forsee with this is someone writing some bars and then turning what used to be one battles worth of material into two quick battles, which raises the point that @
Bleu brought up, bars can seem less impactful if you just read them in a text battle against one dude then you hear them in an audio the next day against someone else.
This is why I propose a time restraint, you can only recycle bars that have been in the arena for 3 months or more. This way almost everybody will still be able to drop opens like crazy considering all of our history, but none of the bars will become oversaturated or start being written solely to milk the most battles out of the bars.
Thoughts?