Cgi is not the problem it is the fact that they are covering up their being no story by having the films full of action and cgi and pacing. The speed and movement through the frame.
The prequels could have been good films if half the effort spent on the cgi was used in hiring writers to craft better scripts and hire competent directors who understand how to get a performance out of actors. Someone that understands more "than faster and more intense".
If Lucas made the originals almost all on his own like he did the new trilogy it would have been just as crappy and full of garbage. Visually stunning and action packed. But he cannot write characters or do human stories at all those are his chief weaknesses. And the main reason why he was drawn to tone poems, cinema verite and film juxtaposed of images that can tell a story without a wriiten narrative.
His friends and employees helped bring the human element into the equation on the original trilogy. Why they were not included in the making of the second trilogy and the yes men were is anybodies guess.
If you want to compare two cgi creations with 2 entirely different results look at Jar Jar binks from the phantom menace vs gollum from the two towers and return of the king by peter jackson.
In the later case Jackson's animators went for the humanity of the character as delivered by Andy Serkis and understood the nuance of a cgi character and to make him seemless with the live action actors.
Instead in star wars jar jar was over the top slapstick and drew annoying attention to the fact that he was an out of place cgi character.
There are more examples too. Look at the way the character of yoda is handled in the original empire strikes back and return of the jedi. He is dignified and wise. His lines of dialogue are short and to the point and not wasted. The character is invested with a believable amount of humanity. Then in Episodes II and III he is a green jumping bean. With a lightsaber. Becomes a comicly farciful and unbelievable character. Not only that his character is ruined he is extremely unlikable in the prequels the exact opposite of the original films.
Also look at Jabba the Hutt the original puppet in Return of the Jedi. There he was a slimy gangster. Very much a cross between a don corleon character and a middle eastern sultan right out of the thosuand and one nights. He serves as a menace and a danger to our heroes.
And his place in the film is a minor one. Even though he is a memorable screen villian or monster. Then he is inserted into the special edition of star wars and is just added uncessarily and adds nothing to the story. And don't even get me started on the way he was abused as a character in the clone wars movie. That was ugly.