Thank you for doing this.
I followed the link - Its 'invite only' , I'm Andrew Halliday (Peta_Z) please send me an invite Thank you.
The 'Fence' on Zwift can be set as 'hot' so if you go say 'xx' seconds ahead of the fence it kicks you off the ride (to stop fliers) . I think fence can be cold but then its only a visual mobile gate.
For club rides the 'rubber band' mode is excellent , as long as any rider pedals you stay together, so any power riders stay together.
I think ride leader can switch fence on/off/hot/cold on the fly, Ride leader gets a beacon above them, rides don't have to have a leader.
Hope something in that is of help, Forgive me if you knew these already.
I'm a fan of Zwift , I did try indie velo .
Thank you,
Andy.