Last race I’d say they had the second most downforce of the field. Rest of the races however I think it’s largely to do with the off-throttle blown diffuser. Last race they had updates though so maybe they have just gained.
It’s a non question, I’m not sure what you mean by low downforce, do you mean lacking? if so, I don’t think they are any more, maybe at the start of the season compared to Redbull, but not any of the other teams.
I think the push-rod suspension is why they are slightly easier on the tyres compared to most other teams and it is probably why they tend to take a lap longer to get up to full tyre temp. But it isn’t a lack of downforce (any more anyway).
You could put it down to a conservative design. One that, by playing it safe, was strong in the early stages before the more daring teams optimised their more radical designs, like McLaren for instance.
There is a fun little theory of mine which says teams like Red Bull, McLaren and Renault are hitting a brick wall with their designs and the development is now tweaking and bringing in new wings. But Ferrari, more of a blank canvas, is easier to bolt new parts onto and make radical changes in direction in terms of R&D development. Informed? Hardly. Any evidence? Not at all. But you know, it’s fun to speculate :)