I am of the opinion that POTUS can shutter agencies without Congress acting, especially when those agencies are unconstitutional in the first place 

 Probably so, to a large extent. Some of the departments and agencies have specified constitutional obligations or legislative mandates. That's a tint fraction of what they do, though. 

 Excellent first steps.  I support all moves in the right direction.  We didn't get here in a day, so I don't expect things to be fixed in day.