Great points.
Old ideas, better yet nature, are great sources for engineering ideas.
Forward swept is a fairly old concept. The main purpose was to explore the use of “instability” as a practical method of achieving superior maneuverability.
When considering designs and their applications, engineers and the bean counters weigh the pros and cons of the feasibility of the design. As you can imagine politics and salesmenship are a big influence too.
As for the morphing wing, I’m intrigued MIT concept and design. It looks promising. The weight advantages and aerodynamic advantages stick out as the driving force behind the success of the morphing wing. the initial concerns I have at first would be how and where would the fuel be stored in that wing? Also, How strong are the connections with the small structures that make up the internal sections of the wing? I’m looking forward to reading more about this MIT design development.
I also found another NASA tested design using a Gulfstream GIII for trailing edge flaps. this single application would most likely be the first application of a morphing wing. The weight savings and aerodynamic efficiency gain from this application would ease manufacturers, pilots and public into the innovative design.

Thomas E Zerbarini