Awesome update, it is just right and very entertaining. I also found it drivable, standard is not hard to handle at all. You people who were rude enough to give 3 or even 2 stars just because YOU couldn't handle it, those stars are for your skill and knowledge of driving such car. It is not GT3, where you can be flat out most of time. This is great mod, sounds good, drives well, and model is nice. Definitely worth to add to the garage.
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I adapted the new Maserati standards to the 550.
I had to reduce grip and many other small adjustements. The cars were faster than Maserati 250F on some tracks. Now much more coherent with Kunos cars.
The general feeling of the tyres is different from previous versions. I have lowered grip and increased load sensitivity (that's what Kunos does with historical tyres). I made some compromise, it's not as sensitive as the Lotus 25 or Maserati (which is why they are very difficult to drive at the limit).