From another source:
"Michelin is flying in new tyres from France, but there is nothing to say that its partner teams will be allowed to use them, as this would be a clear breach of the regulations."

IMO, they should have let the Michelin teams to use the new tyres, but reduce points or something. Give them some penalty because they breach the regulations. Make them all to start from the pit lane or something.. whatever the case.

Asking them to slow down is not fair either. I don't blame Michelin teams for not saying yes to slowing down in turn 13. It's called a RACE.

edit:

I just found another source that said those new tyres from France are also found to be not safe. Geeeeeeezzzz..
Still man.. could have done something else. Anything, just give us a fair race.