When I give a public demo of Process Hacker at SANS conferences, the Terminator is a fun feature to show. It gets attention and helps raise awareness of the tool.
FYI, I also wrote a Process Hacker lab for a security training course attended by over 1000 people per year that included a step on using the Terminator. It's no big deal to edit the lab, but, again, attendees like playing with that feature.
I hope the Terminator will be added back as it was before, not as an optional plug-in.