At short tracks, the mandatory gap idea wouldn't work. If you sent 20 cars out in Q1 at the Red Bull Ring and positioned them equidistant from one and other, they would be separated by roughly 3.2s.
Now try and coordinate that magic 3.2s gap around a full outlap and flying lap, for 20 cars of differing speeds, simultaneously. It wouldn't work.
Sure, once you get into Q2 and Q3, especially at longer tracks, it would be easier, but it's absolutely not worth the trouble imo.
The only solution I can see is somehow discouraging the teams to go out together.
I agree with Stephane - if you combine Q1+Q2 into a much longer session, say 40 minutes, there's far less jeopardy and the hectic final runs would be avoided. Whereas today, because the times are deleted every 15 minutes, suddenly you have to maximise every single run you do. There's too much jeopardy, and that's why everyone is so aggressive regarding track position and slipstream.
40 minutes of open track to decide grid positions 9-20, followed by a single lap shootout to decide 1-8, ran in reverse order of the first session (8-1).
If you just mandate a minimum delta that's reasonably fast you'd get rid of the problem of "multiple cars at differential speed".
The longer session approach would just lead to nothing happening during the first 25 minutes of each segment. No team will send their drivers out for four runs in Q1, and everyone will still try to wait until the final moments to bang in a time when the track is at its best. It will be a session where nothing happens for the first 15 minutes, each team does one banker lap with 10-15 minutes remaining and then the same frantic final moment dash that we have today.
The only practical ways that I can see how to avoid this issue is to either use a one-lap approach, or to send out cars at intervals (combined with mandated minimum speeds on out laps). Both of these approaches would be preferable to the current farcical (and frankly dangerous) situation.
Well, then there's also reverse-grid qualifying races in which this problem also will be avoided...
Edit; by the way, a one-lap system would be much more rewarding (from a weekend perspective) if the entire grid was set that way. I.e; if Verstappen screws up he starts 20th rather than 8th.
Edited by Rediscoveryx, 06 July 2021 - 09:53.