It's great to have low clearance at the nut to have the action low as possible and good intonation, but there is a flip side in my little bit of experience. I can dig into the strings a little better when the string height is a little higher at the nut.
Actually, as a lone guitarist in my band, I often find doing covers that I use a capo to free me from having to barre so often and it leaves me free to embellish the root chords with lead fills by transposing. Using a capo with higher string clearance at the nut causes tuning issues in those situations particularly when capoing at the first fret... Low clearance solves that. Intonation is greatly improved. I do not have any buzz issues. If I develop them over time that neck relief cannot solve, I will remove the nut and shim or shave the base of it down a bit more and shim. Not a problem at all for me to do. I like higher clearance for tapping dynamics, but overall the intonation improvement (expecially for someone as ham-fisted as I am) is greatly improved. It is also very impressive to hand the guitar to someone for demonstration purposes and have it so light to touch to play. If I cut one for a customer, of course, it would be to the customer's likeness.