I think you are right. I've got pretty awesome results with a blank Let Coach Decide, but I use it only if I have to go all out for the win as minutes get screwed up. Also the coach tends to set lineups similar to your previous games with Strictly Follow Depth Chart. At least that's what I've experienced....or maybe my lineup in SFDC was perfect, so the coach used the same thing, with a couple of changes here and there ;)
"Falling in love is not at all the most stupid thing that people do but gravitation cannot be held responsible for it."