In defense of Bioware/EA on this :
Each character is fully voiced for both genders. That's 16 voice actors paid, though I wouldn't be surprised if a couple of them did two or three characters each. Either way, with the amount of the dialogue that the PC speaks, they probably were paid at the same level that any of the main characters from say...Mass Effect 3 were paid. Possibly a little bit more, due to length of script.
While that's just a drop in the bucket of the budget of a game this size, it's way more money than it's worth to re-record a couple extra voice options at this point in the game.
^This. Completely agree.