Theatrical version of ROTS exists. It’s just the HDTV with the missing wipe restored. Schorman did it.
I also think there are differences in the crawl timing. Not to mention that the Blu Ray is a higher quality source than the HDTV rip.
Never heard about the crawl timing thing, and there is a high-quality theatrical bootleg out there to compare to IIRC. And the BR could be used as a source except for the altered rooftops on Kashyyyk, and the audio in the Utapau clone arrival scene.
Plus, the HDTV copy is much higher quality than most. But yeah, BR would be better overall.