If you can stay awake long enough to read through this https://www.faa.gov/documentLibrary/...AC_90-114B.pdf
you’ll recognize virtually all of this pertains to airlines and operations therein.
Having spent a fair amount of time in hold and or spacing vectors while awaiting a runway assignment in VFR conditions to major airports during my career, I found one of the major contributors for delays was a lack of runway and terminal space.
More effective in trail spacing will not alleviate the shortage of runways and tarmac area which until resolved will still incur delays.

Mark this day as the last in which you fly without big brother watching your every move if you're compliant.