Played a little more today....man this is so cool my head is spinning! It feels like a total conversion mod. It's taking me a wee while to suss out the systems and tools available, the diary entries are invaluable, but it's also been cool to try and learn the systems using the GUI menu. Some kind of enhanced leap or jump feature would be alien cool. My only gripe is the VR Entity as player avatar, it's a little jarring against the Tanoa shrubbery so I'm playing in first person, maybe it's just a placeholder but some kind of different avatar would also be welcome. Speaking of Tanoa, this mission feels like it could be ported to other terrains, I'd like to play this on Altis.
I really hope you gain enough feedback to feel the need to continue development of DT, you seem to be able do that very rare thing in Arma....pleasing the SP crowd!