[TrashMan]

I suggest adding a FRED command that controls a ships speed, but isn't tied to a waypoint - rather a more general command that works regardless of what a ship is doing.

[General Battuta]

You can do this with Z-axis field on the ship-maneuver sexp.

[Trivial Psychic]

I'd like a way to force ships that are in a wing and commended to follow a waypoint, to fly parallel to the lead ship and not try to converge on the points as they cross them.

[X3N0-Life-Form]

I'd like a way to force ships that are in a wing and commended to follow a waypoint, to fly parallel to the lead ship and not try to converge on the points as they cross them.

That would be neat, 'cause right now the only way to do something like this is through a ton of SEXPs :
Give each ship its own waypoint, then constantly move these waypoints relative to the lead ship's position, regulate each ship's speed according to the lead ship's own, speed them up if they are falling behind, manually change which ship is the lead if it gets destroyed, etc.

So, doable but kinda heavy SEXP-wise.

[karajorma]

Couldn't you just give the lead ship orders and get everyone else to form on them?