Captioning game content should be relatively easy (I think the captions already exist and just need to be enabled), but captioning fireteam chatter might be hit and miss, unless team members help by speaking clearly. The type of issue I would worry about would be, for example, someone says "we need more on the left" and it translates as "we need moron the left". Or background noise makes it unintelligible. I see this a lot with other text to speech stuff. Still, I think this would be a great addition if it's feasible. My elderly father went several years functionally deaf before getting hearing aids. He is still hard of hearing, but until he got the hearing aids, he really couldn't hear and understand anything unless you shouted into his ear from inches away, and even that was iffy. So I have spent a lot of time configuring his devices, cable box etc to use closed captioning, and am always frustrated when the feature isn't available.