I strongly preferred SB SMN over ShB SMN. I liked having Aetherflow build up toward your Bahamut phase regardless of how punishing it could be do die partway through your rotation. What made me hate ShB SMN was how disconnected much of your rotation was to Bahamut. The apex of your identity as a SMN was still important, and there were connections like with Tri-Disaster which was still very good, but Aetherflow just being there and not really connecting to anything significant other than Fester's potency requiring the DoTs being up, something that's usually always in effect anyway, really killed it for me. I also thought the action icons for the Egi Assaults were very half-assed, but that's a more petty criticism. But I'm an outlier in my feelings toward that which is entirely fine.