

It’s very likely that no amount of negative feedback will change anything. Why not waste some of their time anyway? Write to them, call them, spread the word. This is the only thing we can do. Even if it goes through regardless - at the very least we can make it as unpleasant as possible.
OnlyOffice, not OpenOffice. This is a different suite entirely. Might be better for people coming from MS Office, since it looks practically identical. Also supports opening multiple files as tabs.