AGDI did breathe new life into the whole affair. I was there, in 2001 - 10 years ago - when they breathed life and excitement into a corpse. You cannot take that away from them.
King's Quest I VGA was amazing at the time. It was fun.... and we were all amazed. Regardless of my feelings on fan-fiction, and they readily admit II+:Romancing the Stones took it to a new level.
So far, the only thing Tell Tale has done is pony up the bucks to pay for a license.