For example a vampire dominates a weak minded individual the NWN rules makes it that the domination effect will last not even a minute, not enough time to properly RP any actions, where as in Canon, and if you spam the domination gaze button (which we do not do) you will get dominated by the vampire for a long time, this normally happens until the dawn when the vampire rests thus breaking the domination, or of course the vampire intentionally drops the domination for example when about to feed to feel the fear also or distance / outside factors like priest spells...
With the NWN engine set as it is the domination is so short a single command is not even possible somtimes when in full RP... i think due to the non-party rules this is an impossibility to have but it is a nice thought.
For myself it would save the discussion in tells during the scene as to as and when domination can drop... (Go into the inn and remove all the garlic, or ask me to enter this building, these are all classic actions done under domination, but if you go by time period of spell a person wont even get past the first command).