Maybe the issue with the hologram is that fundamentally it just makes Vader look like a cool little action figure, especially considering the pov. For a bad ass dark lord of the Sith to appear like that onscreen (vs Palpatine's huge hologram which appears later) is almost demeaning, lol.

Jaite's 3rd version with Vader appearing flat on the screen probably makes the most sense although it may not be as interesting as a hologram.

I'm sure if Ady is just refining the hologram though that will be a cool enough improvement...it's a very fast shot anyway.