If you have experience with the right amount of watering, the first thing to do is to compare not just watering time, but Watering time and Frequency.
Drips for example should be run longer and less frequently as they work by reaching deep underground. It is better to run a drip 45 mn every 3 days rather than 15 minutes every day for example.
That said, if the combination of duration and frequency amounts to what you consider too much water, then you can go in the advanced setting of the zone, and tune parameters there to reach what you consider a reasonable amount of water (again taking into consideration the combined frequency x watering time).
I am going through some of that in my install thread below