My personal view is to keep race starts simple until Zwift introduce better meet-up race functionality.
I think we'd agreed that if it's a TT, ride at whatever speed you want to the start banner and then full on until the end banner.
If it's a race, then ride at the speed you need to get with the group you want to be with and then its game on from the start banner to the end banner.
I accept it would be much better if we could actually start at the start banner and end at the end banner as in any normal Zwift race, and not at some spawn point some distance back, but the racing has actually been pretty enjoyable, even allowing for the current slightly random starting method.
I don't think its thrown up any unexpected results, even though its caught a few people out to a small degree when they are unsure where they've crossed the start line relative to others.
I think it will just be too hard for
@bridgy or anybody to try and police the group until we pass the official start line.
As for MTB, agree with the comments above. It'll be interesting to see what happens when somebody tries the first bike swap in the jungle!