I understand your wish, and I'm not sure any data exists to answer your questions.
My guess is, you still want your best OBP guys bunched together in front of your best power guys, and the higher up in the line-up you place them, the better chance they get up 1 more time in a game.
In terms of the 3 vs the 5 slot hitters, our 3rd batter got up 33 more times than our 5th hitter in 2018. That's a lot. The rest of the ABs must really be more important than we imagine for the studies to show having your better hitter 5th outweighs those extra 33 PAs.
I agree, it doesn't seem to make sense, and again, the difference the studies show apparently are very slight, but I trust the studies know what they are doing, and the results are valid.
Maybe, I trust science more than I should. Maybe future studies will show a difference, but as far as I know, not one study shows otherwise.
BTW, it's not like our 5th best hitter sucks as a 3rd batter in the line-up.
Our best 2 hitters are Betts and JD with Devers and Bogey challenging this year. That leaves Beni (who is slumping now) or the Moreland-Pearce platoon as the philosophy's recommended 3 slot batter. I'm fine with that, but I agree that it looks better with them up 5th (old school thinking).
Before all these studies came out, I'd have advocated for this...
1. Betts
2. Bogey
3. JD
4. Devers
5. Beni v R/Pearce v L
6. Moreland v R/Beni v L
7. Chavis
8. Vaz
9. JBJ
I'd still be okay with this, as the slight advantages lost may be close to negligible.