I find the drafting in Zwift a bit hit and miss. Trying to latch onto someone to draft, especially if they’r going quickly, means I often shoot straight past them, and once I am in the draft, especially in a bunch of more than 2-3 riders, it’s difficult to regulate effort to maintain position in the bunch, and to come through and do a turn on the front reliably. I’m using a tacx vortex smart, and think for users with a smart trainer, it would be a lot more straightforward, and more like real-world riding, to have some means of selecting a rider who you want to draft, and then having the trainer go into erg mode to set the power required to get onto the wheel and then hold it. If you then want to attack, you could press another button to release the erg mode, and the equivalent of the “elbow flick” gesture could be used by the rider being drafted to switch positions and move behind the drafting rider.
I think this would allow much more lifelike group rides with organised “through-and-off”,“chaingang”, or “team time trial-style” single pace line dynamics, and would allow groups of riders to really maximise the benefit of riding hard together.