Update from Sam's second part of Q&A (VOD will come up on yt later and be indexed so keep your eyes open for that):
Sam got asked about DLC/more content and said that they have no say in anything, asking about anything in regards to new lines, new parts of the game or endings is pointless as they'd be breaking NDA. They're not allowed to comment much on the endings still as it's not out ln Xbox and frankly, they're just doing their job. Their part in this is to create a believable character that moves you, which I made sure they knew from us here that we see and think they truly have. Everything said in interviews is more or less the same thing and what they find particularly amazing is how many people have found solace and relatability in Karlach. They're grateful for each and every thank you they'd received, repeating what they've said in the interview we discussed 2 pages ago.
Sam also said not to bully Larian into anything as they will almost certainly NOT makenit happen then. But to remember they're also giant trolls so be careful what you wish for! Either way, Sam has NO say in what gets added, cannot comment on whether they've done anything for the game since release, you'll just have to wait and see and/or direct any feedback to Larian and not the actors.
They're just doing their job and trying to do that in the most believable way possible.