I disagree. This kind of thing generates buzz and excitement for golf. It has the potential to get people to watch who otherwise might not have watched. Especially on a Thursday or Friday afternoon.
IMO there are plenty of more hokey things that are done in professional golf on a regular basis than pairing 2 guys together who don't like each other and have formed somewhat of a rivalry.
It's supposed to be an entertainment product after all. I'd be willing to bet that more people would be entertained by the Thursday/Friday rounds had Bryson and Brooks been paired together vs them being in different groups.
Here is another thing to pay attention to (and it happens on several events each season)
This means that the US Open won't get you driving, putting, or any other shot-level bonus's, Meaning fewer points to be had. So if you are picking someone because you think they'll score well with driving scores a bonus, or you take Spieth to get a few of those 5 point hole outs from 100 yards or greater, then you are wasting that pick.
But also, this is the first event of the last segment, so everyone is available for you to pick.