hard to believe
Hard to believe Elop had no awareness of the true state of Windows Phone at the time (or the related internal feedback about all things Metro - which we now know was overwhelmingly negative).
But let's pretend all he had was what his ex-employer told Nokia. Why the hell did he believe it? He had to know how MS operates, how they promise but deliver late or not at all, how they have no scruples about wrecking partners business. So why walk the company off a cliff on a Microsoft promise? That's not 'pretty good' by any reckoning.
I also fail to understand how putting out Android devices is a one way abandonment of control. Every other major phone producer is happy to ship with multiple OSes, including WP even if the Winphone offerings are more about appeasing Microsofts lawyers than sales. Dropping everything for a single bought in OS was never necessary, although I'll agree they would never have finished an OS competitive with Android given how they got into this mess.
When faced with an 'impossible choice' it helps to pick the least worst option, not the worst as Elop did.