Mercedes do still have the best powertrain, hence they are still favourites to win every qualifying, but their suspension is their achilles heel. If the temperatures are getting too high, the rear wheels can't handle all the torque. Thus Ferrari are still strong during the race, even if they didn't win the qualifying.
Season predictions:
1. Shanghai: With avg temperatures around 15°C and possible rain Hamilton/Mercedes are prolly going to win.
2. Sachir: This track is even warmer than the Australian GP. -> Vettel/Ferrari
3. Sotchi: See "Shanghai" -> Hamilton/Mercedes
4. Barcelona: similar to "Sachir", but rain is a little likelier here. -> Vettel/Ferrari
5. Monaco: You simply cannot overtake here, especially this season. -> Hamilton/Mercedes
6. Montreal: On a normal day -> Hamilton/Mercedes, but too many safety cars can ruin the race for him like they ruined the racec for Vettel in 2011
7. Baku: Similar to "Montreal" -> Hamilton/Mercedes
8. Spielberg: Similar to "Montreal" -> Hamilton/Mercedes
9. Silverstone: Even colder and rainier than Montreal -> Hamilton/Mercedes
10. Budapest: Vettel/Ferrari
---- Season break ----