I think the opposite is true.
I only use the humanize function in solo instruments or small ensembles not more than 3 players.
Why?
The way I see it, the more players playing the more likely their individual subtle tunning and timeing mistakes will cancel each other out rendering the ensemble performance at or very near perfect pitch and timeing. I know that's probably a bold statement.
Take Orchestral Strings 14 violins. That's 14 players playing in unison and remember we are usually trying to emulate a professional orchestra with skilled and seasoned performers.
So if 14 violin players play a note in unison, maybe 3 played a few milliseconds early maybe 4 played milliseconds late but the rest played on time. And most of us layer our strings to simulate the early starts and late stops. The same idea would go for tunning.
Anyway, I'm just curious to know what other users think of this mentality.
Also, I'm curious to know how others use the humanize funciton.