I would very much like to have a go with standing starts. My experience in Vintage Racing (both as a racer and as a starter) is that the starter is VERY reluctant to abort a rolling start, no matter how ratty the field.
This is because an aborted start is a very hazardous situation.
The result of this (appropriate) reluctance is that the field is always ragged and slingshot starts (yes, I mean You, Hector) are common.
I vote for a WIDELY SPACED grid and a standing start.
With lots of space on the grid, qualifying will still be very relevant, and stalls on the grid will be less hazardous.
Let's give it a try!