I thought I might give you something to try when Zorin 17 comes out.
Nala is essentially a more user-friendly CLI package installer than APT (See below screenshot).
Technically Nala can be installed in Zorin 16, but it's a far harder process than in Zorin 17.
Now if only Zorin came with this by default...
Reference: Nala is a Neat Alternative to Apt on Ubuntu - OMG! Ubuntu!