Stocks: required. I do not like the triggerguard smacking my knuckles.
Night Sight: Required for improved shooting at distance in low light. I will point shoot at short range, but not past 15 yards. Improving the sight picture is important.
Fixing the charge holes could be argued, but anything that speeds up a reload with flat tipped bullets is essential. This includes using different JHP bullets.
Trigger work is a no-brainer (and I am bumping it up to required after thinking about my last revolver class). If you want to argue against the benefits of improved trigger control, you are just being cranky.