Didn't know Machina very well, but he seemed to be a great mod and user so it was sad to see him leave.
I've always respected Seece and have personally never had any issues with him, and he was a great contributer to the site so I was kind of bummed out when I read he was also leaving. (Fortunately not because of a thread a while back)
Hopefully they'll come back in some capacity over time.