I’m not convinced about this. A fundamental truth behind overdrive is that it confers no long-term benefit (if you find out that it does, then we’ll need to fix that). You’re exchanging DPS for faster overheat. If we had e.g. a DPM (damage per minute) measure, then that would remain the same whether overdrive was on or not.
From that perspective, it’s ok if some weapons have it and some don’t. I never intended all weapons to have overdrive – only those ones where it would have a significant visual difference (i.e. slow-firing “manual” weapons)