I think what hurt Taliek (and this is by no means an opinion that proves me to be a deep thinker) was that he was a top 20 recruit and a McD's A-A, coming on the heels of Khalid, so we had a certain expectation for what that skill level should entail. And he wasn't that good - there were gaping holes in his skillset (primarily shooting) which make we wonder why the recruiting services rated him so high. His freshman year, I thought he was going to be a liability his whole career - I just didn't see point guard instincts or shooting ability.
What happened was he found his role (tenacious D, push tempo, orchestrate shots for Emeka, Ben and Rashad) and got better. Yes - the players around him helped cover his weaknesses. It was good that we had BG to be the de facto point guard when protecting a lead so that Taliek could stay away from the line (a terrible weakness for a PG to have). But there's a certain intangible quality that he seemed to bring to the table and it showed up in the fact that we always seemed to play well in the postseason with him - in addition to the NC, we had two reasonable losses to Maryland and Texas, as well as two BE titles and a runner-up finish (when he was the only one who showed up in the title game). I think that with Ben and Emeka's low-key personalities, they needed Taliek too to help cover their weaknesses.
Before we came back against Duke, I was cringing over what that performance was going to do to his legacy. I was really glad he got a reprieve, and made the most of it by forcing Jarrett Jack into a 1-8, five turnover performance (if memory serves right on the stats). Duhon didn't have a great day either (he hit a 35-footer at the buzzer to pad his numbers a little and give folks in Vegas a heart attack). although he obviously won the head-to-head battle since Taliek was fighting with spitballs that night.