I'd remake them using the AD&D2e rules personally to make it as faithful as possible, BUT making more QoL changes and implementing missing pieces to make it still accessible, as well as conveying information a bit better.
This.
Basically remake everything on a 1:1 scale but just deal with the obvious oddities from 20 years ago. The more I think of it, based on my recent playthrough of BG2 ( just killed Drizzt yesterday) I guess the biggest QoL would be explaining to new players how to play the game if you leave it on 2nd edition ruleset.
And make quest related item a separate inventory. I spent 50% of my inventory management time moving quest items around.
