Ooh, I get to play devil's advocate! The Jaster story came first, and being in Tales of the Bounty Hunters would make one think that it's cannon (as opposed to Star Wars Tales or something else ridiculous). In addition, it was a very good background story. It created a great deal of mystery--just what is a Journeyman Protector? Who did Jaster kill, and what had the man done? Was he justified in his actions? Also, the idea of him being a Journey Protector at such a young age (and taking drastic actions to fight for justice) showed how amazing he was. Finally, it introduced his moral code by giving us his Last Statement, with phrases like "For the Just carry the law in their hearts, and do not need to call it from afar." By defining evil, Jaster showed that he did not fall into that category. It provided a glimpse into the soul of a complicated man. Oh, yes, and Jaster Mereel is a cool name. Now, of course, Open Seasons (written LONG after Tales) messes up the whole Jaster story, but that was done just to fix all the discontinuity that occurred after Ep. II, so it doesn't really seem fair to use at as a means of disqualifying Tales of the Bounty Hunters.
(Disclaimer: I actually prefer the Clone Boba story, mostly because Little Boba was cute and it makes life a lot easier.)
Estuans interius ira vehementi SEPHIROTH!