You haven't yet encountered clashing names?
goimports is wonderful, but some care is needed to make sure it has added the one you intended to add.
NB: Only an issue when new imports are added, not an issue if the correct package is already referenced.
It just finds a match and goes with it, and that does cause issue. Both of the above have potential security implications.
Filippo suggests preferring crypto/rand over math/rand as a softfix in this twitter conversation:
I'd probably prefer html/template over text/template as it's better to have someone ask why their output was HTML escaped than to have someone render HTML in plain text without explicitly wanting to do so.