I do think in general we are a bit high, and possibly absurdly, on Sands, and maybe a bit low on Pirlo/Tommy, but not absurdly.
I do agree with you that if Sands had bombed the top corner against Colorado, then the whole board would have exploded, but that would be moreso because that would be coming from a player that we wouldn't be expecting that from, isn't "supposed" to be in his skill set, and is, if anything, an addition to what he brings. On the flip side, in regards to Tommy, its one of the few things he can do outside of getting into dangerous poaching positions.
That said, I'm not necessarily in the start Sands camp while missing one of our midfielders. And think that Pirlo is probably the guy that should be in there. I could see an argument for TMac, but just don't agree with it.
What I absolutely disagree with, is playing BOTH Pirlo and TMac in the midfield, while we move our CAM to winger, a place where we currently have decent depth. There's no reason to play our CAM out of position (resulting in a less physical wing) to opt for a slower midfield.