Just to address the above point about children leaving: less children = less money. That means less staff. It is a downward cycle if this happens. Be very careful about what you wish for!
To address your concerns when comparing your first impressions with Ofsted: I think my oracle is working pretty well! In one of my earlier posts I talked about schools not being aware of what was wrong and not doing anything quickly enough to rectify shortcomings. When Ofsted talk about independent learning lacking focus, I am not surprised. Young children need guidance with learning. The school should have monitored whether their creative ethos was actually working in terms of progress the children are making. If it was not working, they should have changed it. It is all very well having a creative curriculum, but if you do not get the basics done to a high standard, you are letting children down and Ofsted will not forgive you for it, however good your art displays are. I feel the Head has driven this ethos and the governors have come along for the ride and questioned very little. Are they the right people to make the changes now required?
It is a big red flag that teachers are having to do catch up work in Y2 and Y6. Also that they did not recognise that they needed to improve handwriting and do something about it. The Y2 and Y6 teachers must be good and have realised the children are not doing well enough. However, Y1, Ys 3, 4 and 5 need attention. Especially Y1 as YR is very good. This is a big challenge so the Head and these teachers need to be up for it. From what you say, the ethos of the school is very much the perogative of the Head. If the Head is near to retirement, this might be a challenge too far and they may go. This could mean an interim Head. That could be good if they are experienced and can hit the ground running.
Leadership of the school is not good enough. That is a standard comment from Ofsted when they have sleepwalked into RI. The Head, almost certainly, has not given the Governors robust information on quality first teaching throughtout the school and clearly they have not had accurate information on the progress the children are making and probably didn't ask for it. Therefore action is lacking. One wonders what targets they set the Head regarding Performance Management? It also makes me wonder what was in their current Improvement (Development) Plan? It will be changed now and so will monitoring of success, or otherwise, and actions arising from this.
Ofsted will not make any comment on whether the school becomes an adademy or not. Is it due to be one? Has this been agreed? The school should be brokering help to improve and it probably does not matter who gives it, but it needs everyone on board to make a difference. Ofsted nearly always find Safeguarding is good. It is an automatic RI if it is not!
I would not be swayed by class blogs and parental help if the teaching, progress and leadership are poor. They are nice to have, but this school needs a good Head and better leadership more than peripheral activities. Given that few parents responded to the Ofsted questionnaire, it has not made many parents feel supportive of the school.
Lastly, things don't change overnight. You have the situation, I think, where the Head has an ethos which has now been questioned. Will the school try and cling onto that or will they want to make changes which address the shortcomings by being more "mainstream" in their approach? Their Improvement plan should clearly state where the focus will be. One thing is certain, they must get some teachers being far more professional in their approach to teaching, assessing the children and ensuring children make the progress they should. This is not an overnight fix. It is also a huge problem that the issues raised by Ofsted (and you) have not been recognised by the Head, so who would trust them to put things right?
I don't know whaat you should do. I think it's a question of trust. However, if the Head goes, you may trust the school more. The Governors will get more training in how to challenge the Head and how to interpret data - although if the data is poor, this is a blunt instrument! They have to trust the Head on quality of teaching. They have to trust the Head that effective training is being given to teachers to help them improve and that the Head monitors the quality of teaching accurately.. I would also hope that external advice gets things moving but I feel this will take more than a year unless they all want to change. I think it wholly depends on who is actually leading the school.