The Problem with the lag in game has been found and is being fixed and will be updated today before 3pm, some computers may not have any lag, but the lag on most computers being reported is very clear what and where its from.
The "ActiveBox" Renderer was clashing with all objects insted of the player. and as you could guess making the GPU and CPU raise and cause horrid lagging.
this will be fixed soon. sorry for the inconvenience.