Problem

There are multiple cases where a server member might be far more active in voice channels than in text channels. At the moment, voice activity is at all factored into the XP calculation, leading to these members having extremely low levels despite being some of the most active ones.

Proposed solution

To solve this issue, I propose that voice activity (perhaps only during microphone activation? I can’t recall if that’s visible to the bot without being in the call) contributes to a secondary experience stat, that is added onto the currently existing XP system upon level calculation.
The advantage of it being a separately tracked statistic is that it is trivial to dynamically change how much influence voice activity should have upon the calculated levels on a per-server configurable basis.