@Bruce-McKinlay
Hi Bruce.
In effect, I do both. An overall route is a great way to view the shape of the trip and distances involved, and make sweeping changes to meet our goals of distance, time, key places to visit etc.
I leave this overview in place for quite a while, so that we can make changes close up to when we leave ... then I split the journey into day routes and share them amongst the troops each morning using WhatsApp.
So far it's a strategy that's worked very well for multiple trips and close on 20k miles of travel.
MRA is close to being an ideal partner in this area, and I still think it's the best on the market ... but one or two simple tweaks could make my life even easier and more enjoyable ....