After way too long, the following spells have reduced/modified visual effects:
Spells- Charm Animal
- Charm Monster
- Charm Person
- Clarity
- Color Spray
- Control Undead
- Daze
- Death Armor
- Dominate Animal
- Dominate Monster
- Dominate Person
- Endure Elements
- Energy Buffer
- Fear
- Globe of Invulnerability
- Hammer of the Gods
- Hold Animal
- Hold Monster
- Hold Person
- Knock
- Lesser Mind Blank
- Magic Circle Against Alignment
- Mass Charm
- Mind Blank
- Protection from Elements
- Protection from Spells
- Remove Fear
- Resist Elements
- Scare
- Shield
- Sleep
- Sound Burst
- Spell Resistance
- Tasha's Hideous Laughter
Spell-like Abilities- Aura: Fear
- Bard Song
- Captivating Song
- Gaze: Charm
- Gaze: Domination
- Gaze: Fear
- Gaze: Paralysis
- Howl: Fear
- Shadow Daze
Note: Apparently spells that apply a stun effect will always have dots dancing around the affected character's head. I don't think there's any way to remove it.
And none of the visual cues of the confusion effect were removed, because it would likely cause a lot of fuss if one player attacked another player due to confusion without setting to hostile (it would look like a normal attack, couldn't be proven).