Let's see, an academy to learn how to duel? What, was reading the handbook or just going to the offical card site too hard for these people? I'm supposed to believe a couple of teenagers need entire classes just to learn a simple game? Honestly, this requires a huge suspension of belief.
What's more is the plot. Horrendous plot. The original characters had worthwhile goals that transcended that of the card game. Yugioh GX is the typical happy go lucky shonen boy who wants to be the best. A cliche, but effective plot. Yet somehow GX managaes to screw that up. GX's plot is poorly consistent with the original, an example is the shadow games. For those curious, the shadow games and the dark magic were purged when their source, the sennen items and Dark God Zorc were destroyed. For some odd reason they exist in GX...huh? What's more is it seems GX is more commercialized than the original. It seems its the only reason it was created was simply for marketing purposes, and only that. The characters-LAME! Flat one-dimensional characters. The only good ones are Manjoume(Chazz) and Sho(Syrus). The characters' personality and development pale compared to the original. The villains are another thing, they are nowhere near as dangerous, evil and conniving as the likes of Yami Bakura and Yami Malik in the original. These GX villains are incredibly stale.
To wrap it up, it ain't worth watching. The Japanese or the English version.