Now that I've read all 349 posts...
It seems like the overarching consensus for improvement in summary are:
Better processes - more simplified and consistent rules for function designed to be shooter friendly. Club matches being designed with a emphasis on new shooters (less stages/rounds with a emphasis on mentorship), regional/national matches are a test of skill but you compete directly against your peers for a chance for a class win based on skill level.
Changing the definition of production to mean actually factory produced rifles to be inviting to new shooters (excluding Firearms assembled from custom parts) and removing the price limits. If you want a Christensens get one, if you want to shoot a Ruger RPR shoot it, if you have Dad's Remington 700 sps-dm shoot that too, and if you're balling and you like AI's then rock out. Production should mean Production, not "semi-custom" included.
Change the scoring standards to a points per hit plus time bonus standard as noted by
@lowlight from 3GN practices. Par times of 2-3 minutes seems solid with a max time of 4-5 minutes. Rewards faster proficient shooters without penalizing new shooters. (Consideration for time penalties for misses under this as well)
For skills consistency and prize tables establish a formal classification system to stratisfy skills. Also allows for rewarding all skill levels and a true building up of the sport. (Time and Hit Percentage Ratio as a graded system, perhaps)
Stages designed with effort, variation and creativity to be new shooter friendly and still be a challenge for top level shooters. Frank has mentioned a good way to do this is to design stages that have a big target(s) (2-3 moa) and a small target(s) (1-1.5 moa) incorporated into each stage design. Rather than having different course of fire in a match for different skill levels. Additionally as with all other action sports bring back more movement. This tests the shooters ability under stress and time, but it balances practical rifle builds versus gamer rifle builds. Another item, is bringing back traditional aspects of marksmanship, to include seated and kneeling unsupported.
This all makes sense and brings inline what has made all the other shooting sports successful.