I'm Mark Cooke, CEO of Shiny Shoe and producer on both the Day of the Tentacle and the Grim Fandango remasters. If anyone has any questions about the production of the remasters I'd be happy to try to answer.
I feel like I inherited a solid and well designed project, and I'm so thankful for the thoughtfulness and skill of the many people who've touched this game and its engine over the years :D
On top of that is a modern C++11 engine harness that inter-operates with the original code, provides platform services, adds a brand new rendering system and art pipeline for the remastered art, etc.