I hear you!! I had only lived in London, then Enfield 16 years when we made the move. I felt really stressed at the time about being less urban however Uttlesford area of Essex now feels like it's getting busier. Lots of families moved from North London in particular! The railway goes into Liverpool street station so that helps me feel less remote! Newport is a good sized village with great shop, doctors, chemist, pubs There are still things open like supermarkets, Homebase, corner shops etc long hours. Loads of local family friendly activities and a real community feel. I can honestly say that after 7 plus years I haven't looked back!
Villages such as Wendens Ambo, Great Chesterford and Newport have stations so handy for London and Cambridge and as the kids get older and they want to go further afield. The countryside is gorgeous around here, however the parks are not as good as Town Park, Oakwood and Winchmore Hill but they are much less busy and feel safer to me.
All the schools are good around here, there are 2 main secondaries SWCHS in Saffron Walden which covers SW and some villages and Joyce Frankland Academy in Newport which covers other villages - many people seem to favour SWCHS as it's got a modern look, outstanding ofsted (albeit not assessed since 2012!) and has other funding but it's huge and It's quite a pushy school but is very good. JFAN is an historic school, slightly shabbier looking but more relaxed feel and much smaller. Good on ofsted and good with pastoral care. Both schools are very decent options indeed!! Compared with Enfield schools... some of my friends who are still there had problems with their kids being mugged upon leaving school, more than once! Also the new Wren academy is military with its behaviour policy creating really stressed out kids.
So the parents around here are stressing about which school as "one child they heard of had someone pick on them once" and other minor issues - compared to the type of issues and behaviour and danger from the local area I witnessed in Enfield, these parents have no idea!! There is a bit of low level crime around here from time to time, hare coursing, catalytic converter theft, occasional pick pockets but compared to London it's generally much safer!
There are loads of great cafes, restaurants, county pubs etc too, I feel very lucky to live around here. My kids have been really happy, they have had great opportunities locally for sport - football, tennis, hockey (is big in the area!), cricket, rugby, drama, music, coding etc etc and it's not as hard to get into as Enfield which I sometimes used to find. There are loads of families moving this way all the time so it's not as cliquey, people are used to new families arriving to the area and all were really welcoming I found.
Sixth forms are good too and with the trains they can go further such as Cambridge which has many good sixth forms too.
If you are considering private schools there are loads!!! All excellent in their own way too and many near the station which is handy.
Good luck and any other questions fling them my way!