... Still, the first two days of most 256 players events almost amount to practice rounds for the contenders ...
The way the schedule is set up, only about half the players play on the first day, eliminating some of them. Then the second day, it's mostly those who didn't play on the first day. Those two days do give both the pros and the tables a chance to settle in. The third day is the real qualification day.
I think this is good for the players because there's less waiting for your second match and it's good for the organizers because if someone has a travel problem they can arrive a day later.
They announced the full schedule of the first three days the day before play started, so everyone knew, within any overall delay, all of their possible playing times until the knockout phase.
The tournament tables were kept full with matches from 10am to finish the first day. You get a chance to warm up for five minutes just before your match, and there are four practice tables.