For me there is a slight difference between teething troubles and fundamental aspects of the design and specification of a plane. Teething troubles occur, are cured, and the plane is thus improved; windshields and panels can be replaced.
Sadly at present I have continuing concerns about fundamental parts of the 787's design and spec: the exceptionally complex electrical system, including the batteries and charging system, and the possibility of toxic poisoning should there ever be a serious operational fire. I think the 787 is a great airliner but with an Achilles Heel.