I have two suggestions for improving Team Time Trials, one of which I don’t think would work till clubs are implemented. But, it would be nice to use a similar TT interface as the current ITT one for teams.
The second, is it would be nice to be able to draft on TT bikes, but only if race organizers allow it, and maintaining the current setup in the general Zwift world. This would more closely match time trials in the grand tours. If there was even some way to have a set rotation, that would be neat but probably more trouble than it is worth.