That's the best compromise ant the typical solution for concerts in S.Siro. All acts put the stage in that position. that's the only grandstand with two levels instead of three.

But the capacity is still high (65,000k). I think it's a bit limted in the field for security reasons.
But the big risk of that gig is tha BJ in Italy has not that amount of followers available for the concert. Last year they did a gig in Udine with an attendance of 40,000 people (not sold out but almost...the capacity was 45,000) but 15,000 came from Austria, Slovenia, Croatia etc.

I'll be there...the last tour I attend was the bounce tour in 2003...then BJ has become flat in terms of new records and live performances (not that 2003 performances and boucne record were that great...) and my interest went down. San Siro is 40 min from my house and I follow BJ since 1988, so I feel a bit obliged to go....but it will probably be my "farewell concert".

The only artists that can be 90% sure to sell out San Siro today are Springsteen and U2.

Then....I don't think Live Nation is made by assholes, so probably they have their reasons to make that choice, but believe me, it is extremely dangerous.