Don't just throw away Vegas numbers. Just knock off about 100-125 OPS points to adjust them properly.
Snider's current 1.140ops is good for an adjusted 1.000-1.050ops or so
Hech's current 1.125ops is good for an adjusted 1.000-1.025ops or so
Cooper's current 1.055ops is good for an adjusted .925-.950ops or so
Those are all legitimately very good numbers no matter that they play in Vegas.
Of course, the issue here is extremely small sample size. With them only having 25ab or so each so far, making the numbers pretty much meaningless anyways.
Thing is, Snider and Cooper have a history of being able to produce at this leve, while Hech just hasn't stopped hitting since leaving AA - including an cumulative 1.000ops or so (.875-.900 adjusted) in AAA, but also crushing the ball in both MLB and MiLB training camps this year.