IMO, WA 519 should be left as is, until the reconstruction is complete. I wish that WSDOT had signed the temporary rerouting.
WA 99 currently needs some tweaks:
1. The 1stAve exit should be marked as removed. For some time, this exit was in my list as the southern end of my WA 99 routing.
2. The new interchange for Atlantic/Royal Brougham needs a waypoint. This waypoint would also be on WA 519, when rerouted.