This sounds really interesting and I'm sure it suits some better than others. For me, my bass balances really well on my hip and I never really feel the weight of the bass on my thumb. The thumb only really helps guide it and stop it from tipping side to side in some cases (most times it is perfectly balanced) and also helps guide the fingers of my left hand. Also, I have my Goetz endpin at the first notch (I'm 5' 6") so I can't imagine the Egg Pin would make a lot of different in my case (and the minimum height might even be too tall).
I remember when I had my first lesson and my teacher showed me how to balance the bass. I was like "you gotta be kidding, you want me to hold the bass with no hands like that". Now it just feels entirely natural. When I play in thumb position the neck does rest on my shoulder but when I move back down the fingerboard again, I use my hip to push the bass back out again. Interestingly this is pretty close to what I see in Rufus Reid's book and of course he now also uses the Laborie pin (I believe).
I remember when I had my first lesson and my teacher showed me how to balance the bass. I was like "you gotta be kidding, you want me to hold the bass with no hands like that". Now it just feels entirely natural. When I play in thumb position the neck does rest on my shoulder but when I move back down the fingerboard again, I use my hip to push the bass back out again. Interestingly this is pretty close to what I see in Rufus Reid's book and of course he now also uses the Laborie pin (I believe).