just stick to what's necessary for the children's progress?
Clay, that does depend a bit on the class - though I agree that summer holiday planning is always more about the 'generic' planning, while 'in term' planning is all about adapting it to the needs of the class.
So if last year had e.g. 1 child with dyscalculia, 1 with limited hearing, 2 with working memory issues, 1 with sight issues requiring preparation of separate resources, 2 at different stages of EAL and 3 with behaviour issues that required adaptations of planning or individual plans for a 1:1 TA to use (combined with the usual wide range of ability, which he 'standard' plans are differentiated for.) This year I might have a totally different mix - for example a child with global developmental delay, 1 with cerebral palsy, 3 with symptoms of dyslexia but no identified cause (so not working memory or sight issues), 1 dyspraxic child etc.
Even if the 'standard' plans are re-useable, it is really hard to attain a god work / life balance while doing everything that's necessary for EVERY child's progress in EVERY lesson?
Yes, there are also 'nice to haves' - displays, specifically engaging resources, revising lessons that could be improved but aren't 'awful' - which CAN be omitted to improve work / life balance.
IME a school's marking policy can make a HUGE difference, along with class sizes. 2 written comments - 1 good and 1 developmental - in every book in every subject for the next lesson for a class of 32 is a killer. Highlighted learning objectives and underlining showing where each was met, and the occasional summative comment or e.g. spellings to write out for a class of 25, with some subjects being onkly occasionally marked: much easier on the work/life balance!