I don't really get the point of this test, apparently their main concern for next year is the torque could split the tyres. So they're using the 2013 car which doesn't have anything like the same torque levels!
To be honest, they should get Michelin on board for F1, they're building tyres for Formula E which will last the whole of the race. They have to swap cars half way through the race, the stop is allowed to be a minimum of 30 seconds, during which they will have the tyres swapped from car 1 to car 2. The only exception is for a puncture etc.
If they want to make the races exciting again, bring back refuelling. Grosjean and Maldonado around explosive tanks of fuel? What's not to love?!