Some recent reports on Thai forums mention "87 %" completion of the "civil works" (structures). Who knows on the rest of the process?
The station(s) at Tha Phra intersection (Phet Kasem and Charan Sanitwang), where the blue line(s) (underground to overhead from Hua Lumphong, and overhead from Bang Sue) overlap is very impressive.
The Sanamchai MRT (also Blue Line) underground station is amazingly, and fittingly for the location, impressive.