Just curious, I didn't play the Witcher, but does the Wircher PC have the same choice of weapons, one handed, two handed as a BG3 PC ?
Not quite. As Geralt is a Witcher, he only has 3 weapons available. A steel longsword, a silver longsword and a crossbow (The crossbow is not a typical Witcher weapon, but is added for gameplay purposes for that particular game)
However, I get you're trying to make a point about weapon diversity preventing proper weapon attachments. Though I'll pre-emptively counter that by saying that proper attachments can easily be made for each weapon type (And in many cases, can be reused for multiple weapon types, so long as the actual scabbard or other weapon holding system (Such as a loop for an axe/mace haft to slot into or a hook for a bow to hang from) mates with the attachment straps)
Even easier is if you separate attachments and armour so you don't have to worry about different armours requiring their own designs for each weapon type. You then simply design armour around these separate attachment systems (I.e. If you have a scabbard on your belt for a 1 handed sword, armour will incorporate this belt into their designs)
