This frequency of English localization issues is unacceptable

[Iscah]

Still, couldn't have they kept it as a moment between G'raha and you (for that's what it was), instead of turning it into something completely random and devoid of any sort of emotion?

Because the primary point of that line is to confirm 100% that it is G'raha and he does remember the past events that happened to the two of you, when up to this point he's been maintaining the fiction that he is someone else. It's not as subtle as the Japanese (which I do prefer, though I see why it can't be directly translated without losing its purpose), but it still shows that he is dreaming of the time where he first said those words to you, when he farewelled you at the end of CT.

I also don't see the Japanese version as particularly emotional. All he did was wake up and ask "why are you here?" – the emotional bit comes after, and is perfectly fine in English.