Virtually the only job a 4X400 coach has (or should have) is to make sure his best runner on the day is the anchor.
Don't tell me about positioning and I don't care if it's indoor; that is the worst kind of over-coaching and it backfires time and again.
The Polish anchor didn't have to run any extra (hardly). He just let his momentum off the turn take him past Norwood's corpse.
There is, however, one more thing a 4x4 coach should tell his indoor anchor, no matter who it is: Save something for the final straight! Then that little swing to the outside the trailing runner has to make may be the difference.
USA got both things wrong. 1) Wrong guy on the anchor, and (2) he went out like a bat out of hell, throwing away any strategic advantage when it counted.
And one more pertinent consideration: putting your best runner first to get a lead can very well leave your inferior runners without the competition they need to bring out their best efforts. Second and third runners think they're doing the jobs just keeping the lead, when they are really setting up the anchor to fail.