Do you mean intercutting content from Tales with the first episode of the Clone Wars? It could make the visual quality of the first episode (and first season by extension) stand out more. I could see Ahsoka being found as an interesting cold open to the first episode, but it is possible you’ll want the entire episode.
From my understanding, one episode is about Ahsoka’s force connection being discovered, another episode is a snippet of her early days of training with Anakin, and another takes place sometime after the series finale. Feel like those couldn’t be combined into one episode, but function as prologue and epilogue to the TCW itself, and the training episode as a between-season special episode or something.
The Dooku episodes, on the other hand, probably can be combined into one “season zero” episode rather easily.
Can’t believe you’ve reached the end already!