United Parcel Service's stock has plunged, but it is making important changes to its business that shouldn't be ignored.Shares of United Parcel Service (UPS 1.41%) got caught up in a big story during the coronavirus pandemic period. When Wall Street realized, yet again, that trees don't grow to the sky, UPS, as it is more commonly known, saw its stock price crater. And the company just made things worse when management undertook a major business overhaul.But there are big moves being made that could set the ...