That's too bad as CORE is a real useful tool for researchers. Maybe someone can setup a PPA or provide a snap package for ubuntu/debian. Ubuntu seems to be the most common distribution used by the students at our university. I saw you already provide some debian packages outside of the official debian repos which is great!
This would also open the opportunity to deliver bug fixes and new versions faster without forcing people to build CORE from source (which is actually quite easy :)).
While the root/user separation issue is important for general-use Ubuntu deb packaging, and shared systems like in academics, this traditionally has NOT been a priority for those developing CORE -- e.g. DoD mobile networking researchers -- where they've dedicated one (or e.g. 50) machines to emulation, and the emulator can be freely given root access.
It would take some development effort to provide privilege isolation here. So I think if truly desired it would need to come from community contribution.
Good point about the PPA. We'll try and do that for future releases.