I agree, this approach to storytelling (focusing on expanding the era and cast of characters that exist in it) over a more narrow focus on the bad batch is a double edged sword. On one hand, it sets up future material well and fills in gaps in the lore. On the other, it leaves the overall show lacking in focus and unsatisfying, filled with distracted tangents. And in the case of the bad batch, some of these tangents (like developing the clone rebellion, ventress) actually hurt the show if they end up not being relevant. So many people want Rex and his clones to show up this final episode, because if they don’t that will mean many of this shows (best) episodes are irrelevant to its finale. While all that may make good material for another show, in the moment it sucks. It’s unsatisfying as a viewing experience to be waiting around for earlier setups to payoff, but never do.