This is only a suggestion for the KDE Neon team and developers. First of all a big thank you for such a rock solid distribution! I have switched all my computers to KDE Neon, including my work computer, and loving it! I also love the fact that the ISO is kept up-to-date, and I've never seen that with any other distribution. Great job!

Back to my suggestion:
KDE Neon comes standard with Discover, which is fine, but lacks a lot of software that is only available through Synaptic. Even though you can easily install Synaptic package manager via Discover, I think it should be a standard feature, and come with it. That would be helpful a new user that is not too familiar with KDE in general. Come to think of, you can also download a whole bunch of programs with Synaptic at the same time, which saves a lot of time!

Hello,
you also can use "muon" .
Now I use Linuxmint 18 KDE with plasma 5.8.5.
Mint have synaptic by default.