Mainly due to his implementation. He essentially uses it as a enhanced checklist. The specific pain points on my end are mainly focused around needed data on my end. It would be nice to have historical discussion of the issues, more room for repro steps, and don't even get me started on screenshot storage.
I think what I need to do is recognize that the spreadsheet is not for me and just a checklist for the PM. I need to use whatever system I see fit on my end and update the appropriate column in the spreadsheet when necessary.