I'm not so sure. If the UK had an actual plan and just needed more time to implement it, then yes, I think the EU would agree. If it's just more of the same BS we've been watching for the last 2 years plus another 6 months, then I would guess the EU would say no.
That's a very good point. They have been impatient with us for quite a long time. I tended to chalk that up to them just being @&%#$ negotiators, trying to pressure us into a bad deal. But maybe they genuinely believe we keep trying to fit our square peg into the EU's round hole, and they're like, "Just give it up! You won't go for the round piece, and that square one won't fit, no matter how many times you try. Just stop, already!"
To be fair, I was not comfortable with May's deal, and I am a bit relieved Parliament said no to it. But I don't know what we do now. Call the whole thing off, perhaps? The EU have said that's an option.