I don't know how the teams think about when to send their cars out in Q3, and for sure there's an inherent risk to going out last because you could be forced to make a dash for the line and not be able to optimize the tyre temperature.
But let's not act like Mercedes didn't quite intentionally squeeze back the Red Bulls there, and it's not something we ser going on most weekends. Whatever Hamilton was doing on his out lap was very much outside the norm because his own tyres were clearly shit and his last lap was 2 seconds off the time.