I quit my job a few years back. The HR exit interview was all but a joke. I quit on good terms, but was prepared to give some feedback on how things were in my team/organization etc. The lady was not interested in anything I had to say. She asked no follow up questions, or never noted anything down. She just nodded and it seemed like she just wanted to tick the box to complete the HR procedures. So after a while I just stopped talking and figured we'd get this over with. I think if employers want honest feedback, just implementing an HR procedure doesn't cut it.