The m70 wasn't 'sunk' by engineering issues. The Ct. plant had the highest operating costs, worst quality control, and slowest production speed of any USRAC factory. The union threatened a strike and management pulled the plug. Sounds like it was a nasty place towards the end.
Re: the trigger, I'm cautiously optimistic. I really liked the classic trigger, but they typically came from the factory at 6+ pounds with plenty of creep. True they're fully adjustable and are second to none once tuned, but yeah there's room for improvement.