https://delta.civicweb.net/Documents/DocumentDisplay.aspx?Id=74638
According to this document from the Delta Engineering Department (August 1, 2012) Tilbury is still an intersection, but Sunbury is back to an interchange. Maybe a surprise announcement is forthcoming?
It seems logical given the extreme close proximity of the rail overpass to just build an interchange now.
Also ultimate cross section at the 99 interchange is 11 lanes including the new Burns Dr.
Some footage of driving the roadway from Global TV:
http://www.globaltvbc.com/video/hidden+highway/video.html?v=2288905112