Some border changes that should occur for good reasons:
-the aforementioned town split in half by the Nevada/Utah border, Wendover, article from the Las Vegas Review-Journal this year going into how the town's economy is completely effed up by the border
article:
http://www.reviewjournal.com/local/local-nevada/tale-of-two-cities-nevada-towns-employees-paid-more-than-those-across-utah-border-3004414/the aforementioned Kentucky exclave, called the Kentucky Bend, was created due to lack of knowledge of the Mississippi River when the border between Tennessee and Kentucky was first established and how the border between the states was defined, the course of the Mississippi River which is used in law to set the border was redefined by the New Madrid Earthquakes of the 1810s (ergo, if New Madrid goes boom again which it definitely could, it could change state borders based on how the law defining state borders is written)
The Kentucky Bend is completely surrounded by Tennessee and Missouri, population in the area is 9 in the 2020 census.
The small portions of Yellowstone National Park in Idaho and Montana should be either transferred to Wyoming or made no longer part of Yellowstone.
http://www.wikipedia.org/wiki/Zone_of_Death_(Yellowstone)