The question is.....is this a one-of problem that is only occurring in Australia....or it is a sign for the entire season to come. I am leaning towards it being season long, as the difference between Ferrari and Mercedes was at least 0.7 seconds. I can see how they could make some adjustments and end up regaining 0.2 or 0.3 of that, which I assume they will (and which is why I think they are still ahead of Red Bull).....but I don't see how they are going to make up 0.7 without a new (re-designed) car.I think that it's a bit of both, Vettel was very very slow at the end of the race, and I don't believe that it was just to a poor set of tyres, considering that he was complaining about not having enough power my take is that they had some reliability issue and gave him less revs to take the car to the end, on the other hand Leclerc was flying on the hard tyres whereas he was just about ok on the red ones.
The fact that they were faster on the hard tyres rather than on the mediums IMHO shows that they didn't have a clue of what was going on, had they knows they would have put Vettel on hard tyres rather than on the yellow ones.
My impression is that Ferrari didn't know what was going on, it was embarassing to watch because in qualy they weren't so bad, IMHO yesterday was one of the occasion when Ferrari completely loses the plot
Added to that, if Vettel's problem was a reliability issue, are they also entering the season with a fragile car against what appears to be the rock-solid Mercedes? None of this looks good.