I'm surprised at this point, that no one has suggested going with the (almost always considered superior) Tokyo Disneyland method of just having a mad dash and a lottery at park opening. Physically working to attain park reservations is the only way to be fair.
As the person who may have made the spreadsheet/calendar remark, I can only really offer my personal experience using the system. And yes I had to do most of those things. I would book ADRs 100 days out, with a rough plan of which parks I wanted to vist based on the ADRs, but if Fastpasses for certain things (like FoP or Mine Train) were not available on those days, I would have to adjust things around. The Fastpasses ran out quickly, so I had to be able to adjust my plans based on what the priority was (and sometimes that was a specific restaurant, but most times it was specific attractions). Changing which park/ADR/Fastpass to change was, certainly to me, a complicated dance that required taking notes and making decisions based on those spreadsheets. It also, sometimes failed spectacularly, as was the case when I had a 6:00PM FOP Fastpass and an 8PM Ohana reservation. Thank goodness for grace periods.
I won't say it's better or worse than it is now (I haven't been to the parks since Genie+ rolled out). But I definitely don't think that Fastpass+ was the "normal" way of visiting the parks. I guess I'm just old enough to remember when the only real planning you needed to do was to rope drop King Stefans (or Blue Bayou at DLR) for a dining reservation, while sending the kids off to ride Peter Pan. Back then normal was walking thru the parks, looking at the wait time and deciding if it was worth it, right then and there. Not crisscrossing the park, skipping from land to land in the course of an hour, just to make sure you've hit all the big ones before lunch.