UVs have become dry and common, where the player has to go through trash that does literally nothing when they have damage bonus sets on, with only two unique options for weapons. All of these would

Color UVs for armor and weapons and... costumes?

Red: Alters the weapon to be more red
Blue: Alters the weapon to be more blue (stacks with red = purple)
Green: Alters the weapon to be more green (stacks with red and green for the full spectrum!)
Black, White, Purple, Orange, Yellow, etc.: Alters the weapon to be more of that color (it isn't hard to do this in java!)
Prismatic: Colors the weapon with your personal color

These would be about as common as monster bonuses, and would be in varied amounts from low to very high, just like other unique variants. The idea is for them to water down the pool further, but also to entertain the knight with colorful weapons and encourage third rolls. After all, your weapon or armor isn't complete until it has purple: very high.

Costumes would only ever get color UVs when punched.

Global Damage UVs and multifamily UVs

Damage VS Everything: Is a rare UV that gives a damage boost against everything!
Damage VS 2 families in one UV: Is less common, but still common

So... damage bonus vs one family does nothing because you want to use your weapon against 2, 4 or even all 6 families. I don't exclusively use my flourish against fiends, I use it on beasts and even gremlins and undead for utility.

ASI, CTR and DMG for armor, defense for weapons

Global Armor Damage: Low, Med = as rare as a high/very high
Armor Damage VS Monster: Med, High = as common as a med/high
Global Armor CTR: Low, Med = as rare as high/very high
Armor CTR for swords/bombs/guns: Med, High = as common as med/high
Global Armor ASI: Low, Med = as rare as high/very high
Armor ASI for swords/guns = Med, High = as common as med/high

One major balancing aspect of armor is that you can NEVER get damage, asi, ctr, etc. on them as a UV, but that you CAN get defensive status UVs. Ergo you can make black kat into a balanced piece of armor that gives you huge stats vs everything, but you can never make chroma into anything useful, because it will only ever grant defenses and some slime bonus that no one cares much about.

Movement Speed Increased

Armor MSI: Low/Med = extremely rare
Weapon MSI: Med/High = rare, but not extremely rare.

The idea being that you pop out your argent peacemaker and BOOM, you're running. This would add variety to weapons, which is why it shouldn't be ungodly rare. On armor however, it would easily turn mercurial into a super set that lets you travel at the speed of light WHILE your argent effects most things AND you have that sweet damage UV etc.