Trails from Zero has possibly the best pacing of any introductory arc in the Kiseki series.
Even though I'm more fond of the parties from the Liberl arc and the Erebonia arc, I still had a good time with the SSS. However, the city of Crossbell and its geopolitical entanglements are a lot more interesting to me than Liberl as a setting. I didn't think that she, Estelle and Joshua would have such a big story relevance. So Trails from Zero also acts as an epilogue to the Lieberl arc and Renne's character arc. Which was handled pretty sweet.
Even though I'm more fond of the parties from the Liberl arc and the Erebonia arc, I still had a good time with the SSS. However, the city of Crossbell and its geopolitical entanglements are a lot more interesting to me than Liberl as a setting. I didn't think that she, Estelle and Joshua would have such a big story relevance. So Trails from Zero also acts as an epilogue to the Lieberl arc and Renne's character arc. Which was handled pretty sweet.