Hi
Less is more I'd say. I worked for many years trying to include individual planning, key person planning, next steps and yet more often than not it always ended up that we did something not on the plans at all.....and good stuff, stuff that mattered to the children but, because we had a plan, it stressed everyone out because we were trying to evidence that what we planned had happened even if we'd covered the same objectives in other ways or on different days....
so now we are fully in the moment and Ive been working without a weekly, daily, monthy, long, medium, short term plan of any kind for several years now.
All we write are the individual observation, with the teaching element highlighted. Basically all the planning happens in the moment, on the day, with some inspiration from seasonal events. We have to have an environment and sufficient resources to enable that sponteneity....that is our long term plan - to build up the resources.
You say your staff are already really good at responding to opportunities to extend learning so imagine there are already lots of 'activities' happening that are likely to be meeting childrens needs.
I think what you have in place is perfectly fine....but I'd suggest not making it too much of a 'must do' / ' have to do' ....use the books as a provocation but you shouldn't need to write it up as a focus / daily plan at all - you'd have the evidence of it happening in observation records if needed ....but it's unlikely anyone is going to challenge you on whether you read X book on X day as your plan said.
The main planning is best focused on building up the environment and resources to support you and to build the skills of staff to be able to work independently of plans and to develop high quality interaction skills - to think on their feet and to make the most of every moment!