That reason was because Link from the Legend of Zelda was a playable character. Spawn was in the Xbox version while Heihachi from Tekken was in the PS2 version. I remember some fanboys of the other two systems saying Link didn’t even fit in the SC universe. Yeah I’m sure a weaponless fighter and an african-american demon from hell are perfect matches too. Link fit well with his master sword, bow, and bombs.
The rest of the game was good as the arcade version but with more modes and whatnot. Spent many hours playing this game. Unlocked all the characters, bought most of the weapons, even read some of the awful back-stories. My favorite in the series, and for the record I thought Soul Calibur IV was a big disappointment.