I work at a playgroup and actually we're all fairly happy with the new framework. It's very very similar to what we have now and in actual fact is explained much better and set out more clearly.
The assessment thing is much the same too, and it doesn't mean sitting for hours doing paperwork - scribbling a few observations when you notice a child doing something is fine. For example, one thing we have to do is observe when a child is aware of a need relating to health & safety or their physical needs - noting that a child asks for you to tie their laces suffices, as does that a child knows we wash our hands with soap and water after using the loo, or a child asking for a drink after running around. Hardly rocket science or onerous or inhibiting a child's sense of play or spontaneity is it.
It certainly does not 'throw out all spontaneity in children's play'. Play activities have always been planned to help children development in various ways and this will continue - so you set out activities you think will encourage for example fine motor skills or numeracy skills (less than, more than etc), but the children are still free to choose their activities and indeed to spontaneously change the nature of their play.
I have read so much rubbish and over-reaction in the media recently about this, but I don't know a single early years worker who is against the changes or thinks they will be onerous or hinder play or staff interaction with children. Barely half an hour ago I left a meeting examining some aspects of the EYFS, and everyone agreed how clear and sensible most of it was.
The only thing I dislike about the new framework is that the ratio is allowed to rise to 1 adult per 13 children if there is a qualified teacher in the setting. I can't see any good setting actually operating to this, it would be impossible.
That link hatwoman gave just sets out all the principles underpinning children's play. It is pretty much what we already do and good settings are doing all this as a matter of course. It's not a case of sitting every minute of every day with ticklists or 'testing' children.