My view is that Filoni’s statement is just more empty rhetoric, from a creator who often struggles without rewriting and retconning other creatives’ previous work, as both you guys nailed here and here, in The 2008 Clone Wars messes up continuity thread.
I say that as someone who actually enjoys some of his writing and work.
Anakin was likely the worst Jedi ever, betraying the Jedi Order, and murdering thousands of Jedi, overseeing a galaxy-wide inquisition, and his lust for power seeing him side with those responsible for millions of deaths, and the oppression and suffering of billions galaxy wide, for an entire generation.
Before that we merely had impatience and petulance, shit-talking about his friend and master, perving and making women uncomfortable, and lusting for power. Married in secret against the Jedi code. Executed a defeated & unarmed man, And also what Caston wrote in the post above.
If Anakin was “the greatest Jedi of all time” he wouldn’t have fallen to the dark side. He wasn’t even seduced by it, as we were told by Obi-Wan previously; Anakin was easily and quickly manipulated into joining the Sith by a vague promise that they could somehow save the woman he loved… from some bad dreams he was having about her dying in childbirth. And that lust for power.
Yes, he was strong, powerful and effective soldier & leader in the Clone Wars. Yet as Yoda says, “Wars not make one great”.
But yeah, Filoni probably felt viewers and fans likely needed a reminder of the link to the more recognizable legacy characters.
Which is a little surprising given Ahsoka has previously appeared in The Clone Wars (both 2008 film & 2008 series), Rebels, The Rise Of Skywalker (voice), The Mandalorian, The Book Of Boba Fett, Tales Of The Jedi, Galaxy Of Adventures, and Forces Of Destiny. And I wouldn’t be surprised if we saw her briefly appear in Bad Batch, Skeleton Crew, or even a brief one-shot cameo or reference to her as Fulcrum, in Andor too.