All good and like I said, I have not been there in a long time, but what I am trying to say is that even when they run both sides at BTM, they could have one less train on the tracks.
For Splash, in the slower months they would have the close side and the far side open, but it was only during busy months where there would be a third loading/unload lane to the far left on the close side, during the slower months, that third lane would have themed railings that you might not notice are removable so only two load areas in the near queue instead of three and I assume less logs running.
If Pirates and Small world have five boats off-line, the line would move slower....stuff like that which might not be apparent.
I also assume they could have a higher ratio of FP+ to standby running which I would think would influence the STATS that TP runs.
I imagine you, as a local who visits often, would have a feel for demand based on FP+ being available....back in the day, we looked at operating hours to chose when we would go hoping to hit during slower times, but that got all out of whack the last few years I went and they would add hours to the park the same day we were there.
I think one thing that bothered me when we went during slower times, it was still difficult to find dining (I still recal when you could walk up to a touch screen in EPOCT in the AM and plan all your dining) but when we did have something set up far in advance, we would always see a bunch of empty tables as if they didn't staff properly for the number of folks that would have had table service if they could find it.
Anyway, I am just trying to add my $0.02 as to how rides could have lower capacity to keep wait times up even if attendance is down.