I understand that Pirelli used 35 different constructions on 4 to 12 lap stints doing 70 laps every day of the test. Some were used in Quali lap tests and some used on full quali pace runs over 12 laps.
Pirelli used 30 sets of Hard, Medium and Softs with not many Super Soft as the compounds wont change much next year in order to give continuity if Pirelli stay. The compounds are fine, however they only need construction changes in order to operate at a slightly lower temp and give better longevity and a 3 to 5 second lap time drop off over a 15 to 20 lap stint, not the 5 to 7 present drop off on average.
It will play into some teams hands yes, but it will ensure that most races will be a 2 or 3 stopper with some 1 stopper, but most of the cars will be able to run at 95% of their pace for 90% of a stint, there will be some tyre management but there will be a lot less emphasis on it. And in Quali it will mean that drivers can go for a second hot lap if needed, and also will mean that drivers will have to work harder on warm up of the tyres as most will be colder in the first half of each hot lap.
Thats most of the things that ive been hearing coming out of this test, but it may not be 100% accurate or trustworthy.
One thing id like to see personally tire warmers banned, let the drivers start on cold tires and let them do the warm up, lets see who can really handle a F1 car. It would also give the teams a lot of strategy variation.