I would like a "Use Order Template" checkbox, myself. With an associated drop down of order templates, potentially filtered by relevant system, although that would be a bit much.
For complex standing orders, it would be nice, patrols etc. Colony Runs whereby you go from point a to point b and transfer things w/o having to use repeated orders or cycle orders.
The system as is is very adequate for these things, but I myself would consider these as nice to haves.