I haven't read the entire topic yet, so I'm unsure if there's a consensus on the talking Sligs yet, but here's my opinion anyway: I think Sligs should have in-game dialog, but they should be related to the current state of the story (I.e. talking about "that wanted employee" just in the beginning of AO, or the destruction of Rapture Farms in the beginning of AE), and should also be unique (Never the same dialog in two different places). Also keep in mind many areas only have one Slig, and since not all areas with two or more Sligs should have dialogs, they wouldn't be either too common or too rare. Another point is that in AO and AE, the game is a bit of gameplay followed by a bit of story followed by a bit of gameplay. Adding some dialogs for the Sligs will add a bit of story to the gameplay itself, allowing the players to be much more connected to the story.
