Similar to its BG2 cousin, BG1 Unfinished Business ("BG1UB") is designed to restore many of the cut items, quests, dialog, and encounters from the game's final release, as well as try to tie up some of the "loose ends."
Why do you think that https://github.com/A-Wizard-Did-It/Black-Hearts-BG1 is a good alternative to bg1ub