Wanted to add something if I may.
Had very similar issues with my TRON Pro and although I did not try any new bushings, velcro etc... I DID notice that I had a very weak solder point on the Diode that controls the auto launch feature. (see image) RED arrow is actually pointing to the Diode that is in your machine, GREEN arrows show solder points.
So, when 1st firing the machine up, things would be normal for the most part, but over time, bad launches, flipper auto launch was taking like 4-5 pushes before launching ball, multi-balls would sit in shooter lane for several seconds before luanching etc... as some describe above with the AC\DC Pin, were happening to me as well on my TRON.
Once I discovered the bad solder point (which IMO got worse as the machine heated up, was played and bumped more) and touched up the Diode with a splash of solder onto the far right contact... Wa Bam! All is well now.
I borrowed one of your images playernumber4 (thank you) to illustrate where the Diode and solder points are. This is not an image of my actual (fixed) problem.
Yes, mine is STILL just as sloppy as all the others described above, but it is now making full launches, nothing sits in the shooter lane, and the flipper launch works as it should on 1st press of button.
Hope this may help some.Ball Launch Diode.JPG