Ubuntu software gives no message of unresolved dependencies

Ubuntu Software seems to give no message to user when installation of a .deb fails because of unresolved dependencies (in Yakketty daily as of 02 Sep 16).

I tried to install several third-party .deb packages. While installing Google Chrome from the official site worked, installing Mega (from https://mega.nz/#sync ) or VPNUnlimited (from https://www.vpnunlimitedapp.com/en/downloads/linux ) seemed to revert the GUI back to "Install" button and the apps were not installed.

Further, an attempted Gdebi install from terminal gave error of unresolved dependencies which Ubuntu Software did not report:
Mega:

Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading state information... Done
Denne pakken er ikke installerbar
Dependency is not satisfiable: libcrypto++9v5

and VPNUnlimited:

Building dependency tree
Reading state information... Done
Reading state information... Done
Denne pakken er ikke installerbar
Dependency is not satisfiable: libjsoncpp0 (>= 0.6.0~rc2)

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: gnome-software 3.20.1+git20160617.1.0440874.ubuntu-xenial-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-9136.55-generic 4.4.16
Uname: Linux 4.4.0-9136-generic x86_64
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 2 22:35:50 2016
ExecutablePath: /usr/bin/gnome-software
InstallationDate: Installed on 2016-08-31 (2 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Alpha amd64 (20160831)
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)