@oralloy,
I venture that a stisfctory precedent has been established in this case. First determining that its DNA is assignable to some series of haplogroups may be all thats needed for now.
When some new technique that gives us the guys name and address shows up, I suppose theyll be back in court.
Theyve already established what Kennewick had eaten before his final planting. (Id really suggest tht you track down the Owlsley an the later reports(They differ mightily based not on "new technology" but more on the rejection of "old pqrqdigms" (like phrenological Bullshit).
I really think theyve mined whatever DNA can give us. The Dna track is very clear because of better cleanup techniques . Weve got Y DNA and mDNA and even epigenetics. (He smoked?).
I think the most revealing technique was the use of induced luminescence to determine where the guy may have died and whether he was moved to his final spot in the creek.