Yes, but for me this "no departure sequence = depart exact on CTOT" part is B/S. When working GND position, I always try to get everyone to the h/p as early as possible, and on TWR I will depart them as soon as possible, so yes, CTOT-5. Aiming at exact CTOT makes little sense, and in fact would add more workload. If it's called "tolerance", than it works both ways - I can delay someone for a better sequence, but I can also speed him up.