Originally posted by Quinlan_Vos
Why wouldn't he become good?
He wouldn't become as good.
Already as Padawan, he was that skilled.
No. As an enraged padawan, tapping into his darkside emotions, he was good. As we see later, Obi-Wan doesn't rely on his emotions to fuel him. Emotions make anyone a better duelist, but as we know - the usual emotions used to do that (anger, hate, rage) lead to the Darkside.
During the beginning of their duel, Obi-Wan was being tossed around like a ragdoll with ease.
As a master, he would probably be as good as Anakin.
No, Anakin would've killed him had Obi-Wan not mastered Soresu. Ataru is offensive, and so is Djem So. It was only Obi-Wan's defensive skills that saved him against Grievous, as Mace does say "the simplicity of your form will stop Grievous" or something along those lines.
Against Anakin? Lmfao. Say goodbye to Obi-Wan. He mastered Soresu to the highest degree, if he had done the same with Ataru - you'd have to prove that Obi-Wan with Ataru is better than Obi-Wan with Soresu. Which you can't. And we know that Obi-Wan's Soresu allowed him to defeat Grievous, and hold off Anakin. So, I'm going to say his Soresu > Ataru.
And where's proof he would be as good as Anakin? He masters the form, he masters the form. It is stated that Obi-Wan's defensive is key against Anakin as well (ROTS novel, IIRC). Ataru is not offensive, so I doubt he would even be near Anakin's level. Dueling ability IS dueling ability. Anakin IS the better duelist, Ataru would not change that, no matter how many years he had to practice.
In AOTC, he was back to square one except with Soresu.
You are aware he switched to Soresu after Qui-Gon died, right? Because he wanted to protect - as he felt that was the reason Qui-Gon died. Meaning he had 10 years (32 BBY to 22 BBY) experience with Soresu in AOTC, unless you're trying to claim he started Soresu in AOTC, and mastered the form in three years. Which is definitely not the case.