Show timer for superweapons on the weapon's icon instead of as a powerup
For visuals and some gameplay fixes it might be preferable to show a unique countdown timer on weapons that expire (i.e. superweapons), as opposed to a generic "superweapons" powerup (which encompasses all the superweapons the player is holding). This would make it clear which weapons are going to expire, and fix the age-old issue of picking up different superweapons extending the shared timer for all held superweapons.
This should not replace the ammo counter, as some superweapons still make use of ammo (Vaporizer).