Yes, I am one of those people who completely "rewrote" GT as she was originally watching it because she was so unhappy with the directions it took. I forget some of the names of the fics but I know the first one was way back in 03.
The thing I was most unhappy with was them turning Goku into a kid. I was one of those fans who, back when she first got into dbz, totally fangirled over adult Goku as I watched him hand the Ginyu Forces' collective asses to them while swooping in shining-armor style to save Gohan, Vegeta, and Kuririn from certain doom.
I thought that THAT Goku was amazing. <3
So seeing them chibify him upset me greatly.
To be honest, I think part of the reason why they made ssj4 the way they did, having it so Goku was an adult while in that form was to get people to like the form BECAUSE he was finally adult. If you wanted adult Goku during gt, ssj4 was all you had.
And while ssj4 is handy in terms of fanfic purposes, I find ssj3 is, to me, the pinnacle of Goku's power. Always thought ssj4 was more of a compact oozaru form.
I also found gt to be seriously lacking in all things Vegeta.
Vegeta's just such a fun character for me to watch, just because of how overboard he goes with things.
Seeing him stuffed in the backdrop the way they did Yamcha and Tenshinhan broke my heart.
At least Tenshinhan never suffered a "moo-stache" and horrible haircuts!!
I think I would've enjoyed GT (especially the early eps) a lot more if Goku was an adult on those travels. I mean, his chibified form didn't even LOOK like how it did back in Dragon Ball. It lacked the chubby, round form I find adorable in db's child Goku. GT chibi Goku looks more like Goten with a tan if anything.
....I'm ranting aren't I?
Forgive me. ^^;;;
Anyways, my take: GT needed more adult Goku and more screentime for Vegeta. You know what, I wanted to see them send VEGETA into outer space with ADULT Goku, Trunks, and Pan.
Can you imagine Vegeta and and Adult Goku in that episode with the Para Para Bros? Or the episode with the bride? I would have loved that if they stuck real Vegeta, who actually has experience out in space, along with them.
OH! And to keep Goten's end-of-dbz haircut. His GT hair was equal in horrificness to Vegeta's.