I dont even understand what problem Attunement is even supposed to fix, exactly.
Other than to make certain people happy who like low magic settings.
Also if its supposedly a 5e mechanic, where exactly in the PHB does it turn up ?
By the way BG3 really doesnt have that many slots for items in the first place. We only get:
- Helmet/Headwear
- Armor/Clothing
- Shoes
- Gauntlets
- Cloak
- Amulet
- Left Ring
- Right Ring
- Primary melee weapon
- Secondary melee weapon / shield
- Primary ranged weapon
- Secondary ranged weapon
Then we get Musical Instrument, Torch, and Three items of "camp clothing", all of which is never enchanted anyway.
Compared to BG 1+2, we lost the girdle slot.
And compared to typical MMO amounts of slots, we have very few. For example Vanguard: Saga of Heroes had:
Head
Face
Chest
Feet
Hands
Legs
Arms
Waist
Shoulders
Wrist
Cloak
Amulet
Ring (2x)
Earring (2x)
Primary
Secondary/Shield
Ranged
Ammo
So thats 16(!) slots, compared to 8 in BG3.
There are a lot more slots, but this is the adventuring gear.