I would disagree. The images you posted - couldn't load them completely because of slow internet - are from the desert location, I assume. That means more sand was available to pile up for greater defense. Gaara's sand was unable to block Yasaka Magatama from Madara completely and in fact a Golem was used for assistance.
The swords of a lesser Susano'o are shown to be much more brittle than the actual compact structure of Susano'o - Tsunade accomplished the same by breaking it in two. The fact remains that Susano'o has little to no weakness in regards to any elemental based or any other physical attacks. It's a much more all-round defense set-up. The examples would be Punches, Suiton attacks, Raiton, Fuuton, Lava Release, Sand attack - which was blocked by Sasuke effortlessly - etc.
This is how I see it.