Speaking of unheard voices, Do you think you'll add in any additional cutscenes that don't feature any dialogue?
Maybe something like what the sleeping cells in Rapture Farms would look like?
(E.g "I was working late one night, at Rupture Farms". Panning shot of rows and rows of cells, cut to Abe sleeping on a single hammock full of holes and stains, no pillow or blanket, one leg hanging out the hammock, and then a massive fire-alarm siren alarm clock strikes midnight and flashes the Text "GET TO WORK, CHUMP!" over and over as Abe falls out of the hammock and fades into the floor-waxing scene.)
Or maybe how the Mudokon Paw got on the moon? Lorne explained that he originally wanted to have an FMV of a meteor storm slowly forming the paw as Abe was escaping from RuptureFarms, but couldn't do it due to budget limtations. That being done on the BitSquid engine would look incredible