On 7 Nov 2015 11:41 pm, "David Reitter" <david.reitter@gmail.com> wrote:
>
> When installing a package, give an acceptable “XXX successfully
installed” message in the echo area as the last message.
>
> Also, if the *Packages* buffer is present this buffer should be updated
to show that the package was installed.

Agree with all of it.
And if anyone would like to try their hand at it, both issues should be
very easy to fix.