Ok. So I know that's hyperbolic, of course.

But I've been using the DIS to plan trips since 2007 & the boards seem so quiet these days JUST as I'm approaching my time to make FP+ reservations!!!
There are lots of different strategies -- they're about as diverse as the people going! I think if you're noticing a lack of "strategy discussion" regarding FastPass+ then it's most likely because the system is pretty cut and dried... it's not hard to use, yet cannot be strategically overused to get more than the next guest. Think about how many times someone asks... "Should I use my FastPasses early to maybe get more, or save them for midday when it's busiest"... and the answer is almost always... "It depends on you!" There is no optimal choice. I've used them early, midday, and late, and they all work fine. But you're talking more about personal touring preferences and not strategy.
It almost seems like the only strategy these days is to arrive at RD & ride as much as possible til 11:30/12, have three consecutive FP+, and then go back to the resort and people watch, swim, or drink.
I still see lots of strategies. We got back from our trip about a month ago and didn't employ only ^that strategy, and rode stuff all day long. I would say that
used to be the best strategy before FP+, because the earlier you got to the parks, the more FP- tickets you'd get. But with FP+ the requirement to be there at rope drop is removed from the decision. Now we have days when we go in at EMH / rope drop, and then days when we go in at 10 or 12. There is not as much pressure to be there early because you don't need to beat other guests to the FP kiosks -- you've already lined them up.
AND take longer trips to get to do as much as you used to do in shorter ones.
That hasn't been for us. I'd say we're getting more done per day, now, than we used to. It has to do with the middle of your day being more productive now. Or maybe it just seems like that cuz in your earlier trips you have so much to do, on later trips you've kinda seen it all so it's not as pressured.
As someone who only has 5 park days over one week, please tell me there's more hope than this.
Heh when are you going? You'll have fun.

I'm sure you know it's not as dismal as it can seem out here. Get SDMT FPs on both of your MK days... you get thru the line in about 5 minutes in the middle of the day! And avoid Fantasyland at park open. Go somewhere else, like Frontierland or Tomorrowland. You can ride whatever there with no lines for the first hour. Plan your park days to create a path that takes you once around the park. Line up your ADRs and FastPasses so you aren't backtracking or doing extra walking.
We were a party of 10 as well. This makes changing stuff around difficult, because 10 of anything hardly ever opens up. 3's, 4's and 5's all the time, but 10 in a group, no. So lock in your ADRs and FastPasses and plan to stick w them.
And last, I'd say despite the need for a good strategy, don't put
too much pressure on being all strategic all the time. When you get there and get into the swing of things, everything seems to work out. Lines were not long everywhere, and a little bit of just being aware and going where you want when you want is good, especially with a large party!