I have never owned a guitar which didn't require nut-slot tweaking and saddle adjustment, with the exception of my Collings OM which was absolutely perfect straight out of the box.

The most serious tweaking I have done was 20 years ago on a Lakewood Dreadnought where I had to reshape the neck profile with a cabinet scraper ("card scraper" in the US) to make it fit my hand.

I have done the exact same thing on an Eastman which is currently my go-to gigging guitar. Nice instrument with a 1 13/16" nut which suits me perfectly, but way too much wood on the back of the neck, at the shoulders. I made the neck profile a modified V instead of the chunky C factory profile. Plays much better now.