Well, I personally believe any show done by 4Kids should get the One Piece treatment and be completely redubbed. I also think any of the Viz shows that came on Toonami except Naruto should be redubbed as well. In particular Zatch Bell, MAR and Blue Dragon. Not a lot of the voices were really cutting it for me in those shows. (except for Yuri Lowenthall's roles)
I would also like to see FUNi re-do Rockman.EXE/Megaman NT Warrior, if not only because the viewers were screwed out of the last 3 seasons (I wanted to see Stream dammit)
I'm glad that FUNi has The Law of Ueki and Shakugan no Shana because both of those shows are excellent, however, upon hearing the dubs, my ears began to cry. Particularly with Law of Ueki. I mean have you heard the dub for that show? Ueki sounds waaaaaaay too bored. Even in a big-time life-threating action sequence. I mean, I know that he is like that in the original version but they played the bored part up too much. Sano and Mori's VA are...lazy. No other word for it. They sound like they decided to tape their voices when they just woke up in the morning. The same with the other power users. They were all just bland and un-interesting. The only voice I thought worked was Robert Hayden because he sounded incredibly psychotic. A surprise of a bad dub from Geneon
And don't get me started on the subtitles on the DVD's. They were obviously dub-titles. When the DVD's went out of print, I admit it now, I watched the rest of the series fansubbed. I am not Japanese, but I can direct my mind around a raw episode and I can definitely understand what they say when it comes to shounen shows like Law of Ueki. (I can hear them say Koba-sen on the screen Geneon. I'm pretty sure his name is not Mr. K)
As for Shakugan no Shana, every voice was bland and kinda blended together so I was disappointed by that too.
That's all I got for now.