>>5335892With a squared ring, you have 4 equal points of support and then the canvas sags towards the middle which is supported by a large during underneath. This allows it to have a decent degree of give.
In the 6 sided, the 6 degrees of support means there's more support and less give.
The problem with the TNA ring was not that it had six sides but because it was badly engineered. The idea is fine but the ring needed to be larger to make up for it and other small changes to make it more usable.