There's been such a long period of buildup and anticipation for this trial that people expected some kind of immediate payoff in instant bombshell revelations, and that's just not the way criminal trials work.
It's going to be the task of the cross-examiner of cumulatively undermining credibility with lots of small points, not coming up with some big bombshell that's going to leave one of these guys exposed on the witness stand in some dramatic way. It's just not going to happen that way.