Re: AANJ? Is there a need for it?
No doubt AANJ is more ergonomic for quick leads. People with different styles and different skill levels with have different opinions... It really depends how much time people spend on the high frets. Neck joint will literally not matter if the player rarely goes beyond the 15th fret. But for people who are mainly lead players, and play a lot of stuff between the 12th and 24th frets, will likely prefer something that is comfortable. Comfort is subjective... Most guitarists I follow these days seem to favour ergonomics (AANJ-style bolt-on, set-neck, neck-thru).
I don't really have an issue with square heel when sitting down and playing either.. Just have to adjust to it a bit with my hand/wrist position... but playing standing up at gigs is a different story. I find it tough to get around the heel unless the strap is extremely high up.