You should set up your guitar how you want it! Specs. should be viewed only as a good starting point.I tried to adjust my strat neck relief to fender specs .010" and didn't like it as the neck felt straight so i added more relief(up curve) and measured it .018"(about thin pick .46mm)
adjusted my desired action (2mm on the low strings 1.5 on the high ones at the 12th fret) no buzz or intonation problem.
I use 9 gauge string so the tension on the neck not that much. should it be tighter than 0.018" or okay to have more relief if i like it that way?