It's interesting that the marketing spiel (and urban myth) for those hog tying harnesses has always stressed how much better the weight is distributed on your body with all those straps.
And yet many are happy with the Rick Young (including me) and don't seem at all upset by the thin cords.
I have always found the neoprene neck straps, both original and aftermarket, more than adequate for 42s. Short periods with my 56s have been fine, but the 56s normally live in the pack. I call BS on the weight distribution spiel.
Properly adjusted, the harness definitely reduces swinging, even compared to the original strap snugged up high on the chest. However I see many users with the things swinging down between their legs like a sporran, so no benefit from the harness in those cases; only complication. In the majority of pics I see, the bin on the badly adjusted harness is significantly lower than it would be on a simple neck strap.
The chest packs (some) have some real benefits, but very few of them will take 50s or 56s without needing two hands to drag them out. Some are so tight that even 42s need two hands to get the bin out, which is ridiculous. The models advertised for 56s are the same footprint as those advertised for 42s, with the only difference being the height - Useless !! AGC is the only exception that I have found to this major failing.
The chest pack is great if you are carrying a back pack, and provides good protection.
For quick and easy, the versions that have the top flap opening out and away from the user are the only way to go. The only ones that I am aware of that do this are Marsupial and Kuiu. There may be others.
30/32s I have always found a neck strap and drop them down the front of the shirt/jacket works. Not good in very cold weather as they fog when pulled out, but otherwise quick, easy and tidy. The neck strap on my 30s easily allows the over shoulder/under arm option should I wish.
So for me, they all can have merit in different situations when PROPERLY FITTED and ADJUSTED.