Individual feel thing really! I had long leaders with many knots made for the kite end of my attachment points! Changing at the kite side, lets me keep my handle end feeling consistent in my hands! Nothing ever changes there! I've found a pretty regular knot setting I use 95% of the time! Sometimes I change it for room dynamics if I need more drive or brake!
Neutral? For me - yes! For JB - probably not! It really is a feel thing, you find what works for you!
Most new Indoors need a little more flex for the LE, they come a little too straight for most, but that again is personal choice! Best to set it up next to another to compare LE flex!
Characteristics - I look for a "floaty" feeling, others something else! The LE bend seems to make the kite float more in the inverted position!