I JUST PLAYED AND SG GUITAR, AND IT WAS SO EASY TO REACH THE HIGHER FRETS, BETTER THAN NECK THROUGH GUITARS.. WHAT MAKES THE SG LIKE THAT? I THINK THOSE SHREDDER GUITARS SHOULD DO A MODEL LIKE THE SG..
both characteristics (neck dive, fret access) are basically results of the specific design.
IMHO Ibanez single cuts (ARZ) have the best fret access without the neck dive.