Just watched the 501st Legion episode, so here are my thoughts:

Loved the carry over from Malevolence that they’re still looking for Grevious, and the Rishi system is where Grevious is hiding. With that added context, it helps propel the plot forward in a natural way and helps tie the Rishi base plot to the Malevolence episode and the assault on Kamino. Everything was well paced and the transitions between episodes felt natural. Even though the Kamino battle is from a later season (and has better animation), it never felt out of place. The only place where something felt off was during the scene on the bridge between the clones being rescued on Rishi Station and the assault on Kamino. Specifically, 26:48-27:15 is where the audio seems a hair our of sync (Rex starts talking a hair too soon), was noticable with Rex’s first line and Obi-Wans line “The Separatists are taking quite the chance, considering this.” Overall though, it worked wonderfullly pacing-wise and plot-wise.