The Ferrari fawning has been painful in the past couple of weeks, even worse was the "Mercedes still have tire deg problems, it was just hidden last year because of their performance advantage". It was beyond stupid and so many people were saying it.
If one car can do say 15 laps at 1:32 lap times then needs to pit, but Merc both do 1:30 second laps and manage to do 17 laps before pitting, they absolutely have better tire deg. Tire deg is dependant on the speed you're doing, going faster and longer = better tire deg, going faster but having to pit earlier = probably similar tire deg, going same speed but pitting earlier = worse tire deg.
Even in Malaysia Merc never showed actually worse tire deg, just less good than normal. In practice Ferrari did longer stints... but Merc were a second faster per lap. They could obviously go longer if they were going slower.
The biggest mistake teams have made for the past 2-3 years is effectively trying a long stint strategy, which means going slower per lap... but then being forced to do the extra pitstop. You basically decide to go 1-2 seconds slower a lap for 15-20 laps then having to pit anyway, rather than going that 1-2 seconds faster the entire stint.
The extreme temps brought Merc MUCH closer to Ferrari, but the strategy tipped them over the edge. Without extreme conditions the better tire wear and faster speed re-established itself.
Ferrari have still improved massively over last season, and they are much closer, and track dependant and condition dependant there will be other races they get damn close, maybe even win. Merc will also make more strategy mistakes(as most teams will) and there will be more chances. I think Ferrari's gains have been overstated, the car was pretty meh last year. The engine drastically improved, they are maybe where you'd say Merc were in 2013 with the car, a huge step forward but need time to develop a good base car into something really special.