What the hell was decisive about writing a mealy mouthed apology letter and letting the disaster stagnate with no significant improvement as a massive black eye on Apple's core revenue product for a year now?
Decisive would have been pulling Apple Maps and letting users set their own application as he knew Apple's wasn't good enough.
Instead Apple continues to abuse it's monopoly control over iOS software distribution to prop up it's own failed product at the expense of customer's user experience.
Maps was skewered because of 'oversell, underdeliver' by Forstall. He paid the price, and yes, that's decisive.
Google gets away with precisely the same flaws in its Maps (which still exist, btw) because people expect less from a company that specializes in hobbyware.
And there is no such thing as having a 'monopoly' over one's own products.