Hi and welcome to the profession.
I have 15 children on role, do nurseries, school runs and after school pickups and have still been graded as 'outstanding' by ofsted both before and after the introduction of the EYFS. So I don't think how many children you look after is the deciding factor as to whether you offer fantastic care or not. It's more to do with the care you offer.
All day outings are great, but there are only so many you can go on, it is more important that the children learn day to day things like dressing themselves, using a potty, feeding themselves, joining their peers in activities, learning behaviour rules, learning about the local community etc. and you will want to join other childminders for support and socialising (for you and the children) and most childminders will be looking after more than one child and have pick ups to do.
Be careful not to get to hung up on the paperwork - what you get down on paper doesn't always make you a fantastic minder and it isn't always the deciding factor when you get your ofsted grading. Ofsted haven't given any definite guidelines on what they are expecting and every inspector has their own agenda. I have two very good childminding friends who have both recently gone through their inspections. They both had identical paperwork, they got their policies and procedures from the same place as me and they do the same observations and plans and the same safety checks etc. More often than not we get together for activities so no difference there and we all look after the same amount of children. One of the minders got good and the other outstanding, neither got recommendations - the only difference was they had different inspectors.
The bar has definitely been raised and childminders have access to many courses and support than ever. When i started out there was nothing. However, I do think if you are going to be an excellent childminder it has to be something from inside as well as on paper. No-one can teach you how to love children, how to show empathy, how to respect and like difficult parents (and you will get some).
As for childcare standards in the past, I have been in the profession for 17 years and the children I have minded over that period still come back to visit, and I am now looking after 2 sets of siblings whose older brothers and sisters came to me many years ago, so they all survived and thrived.
Best of luck for the future and again welcome. Keep us all posted as to how you get on.