For me the thing I would have really liked in the voice acting for Revelation was for Mer-Man to have that warble in his voice like he did in the original Filmation series, when I first heard him talk in Revelation I kinda felt disappointed at first cause one of the first things I associate with Mer-Man is his unique underwater voice.
Where as in Revelation it didn't sound like that, and just sounded like a regular voice you would give to a bad guy.
It wasn't too bad and I did get used to it but I definitely felt it was a missed opportunity though as if I was doing the voice for Mer-Man I would have absolutely added that underwater element he had when he originally spoke lol
Edit: No way, I just found this haha
That's EXACTLY how it should have been, or had some element of that to it at least lol