Grr, why don't people get it, either the commentators or people on here. You might end up half a second a lap slower for 5 laps but that might give you 2/10ths a lap for the entire last stint which would be potentially say 18-20 laps.
Giving time away isn't a bad thing as long as you give away less than you can gain back. These tires run in a certain temp window for a given life, ie you can run every lap of the entire stint faster if you want them to last 18 instead of say 22 laps.
EDIT:- if he does another 3 laps he can certainly think about supersofts though depends on life taken out of them from pits. Same tires will still be faster over a shorter stint, considering they used all the supersofts in qualy I think he wouldn't want to do more than 15 laps on a set. Rather needlessly burnt out a super soft set in Q1 because they didn't think they'd use them in the race. There was no chance they'd do more than 2 stints on softs so saving the third in qualifying was pointless.