This doesn't play like an Original Sin game, particularly because the mucking around combining items is missing. I don't find myself collecting nearly as much junk that might someday be useful in BGIII. That always took up way too much time. Well, there is the shovel.
Of course story wise there are the similarities: crashed ship and a non-removable magic slug/magic necklace, washing up confused on the beach like Link from Zelda: Link's Awakening, you almost immediately find too many companions to take along, some of whom are really hostile to you at first.
Anyway a new Original Sin with BGIII graphics would be amazing.