Uniwersal principle- pushing for times is not mandatory even in entire race sim. Previous simulation Williams was even worse, much worse. I don't think they found a second-two by night.
Shiroo, yes. They changed tires on last stop a few laps before finish or I'm wrong.
Do you have the times for the previous Williams race sim? Be interested to see exactly how much slower it was. Comparison will be difficult being on two different days, but it shouldn't be nearly 1 or 2 seconds a lap.
And race sims aren't much of a 'sim' if they aren't looking very closely at lap times. Maybe they're not going absolutely 100%, thats reasonable, but there wouldn't be a whole lot to gain by backing off a second or more a lap, either. That would make the testing of the tires somewhat useless as they wouldn't know what to expect once they ran at full speed. It also wouldn't stress reliability as much, which is something they'll be keen on ensuring.