It's really an issue with Price, given that McDonald is nailed on virtually all the time. For whatever reason, all of Davis, Evans, Rowe, Edwards, Saville and Coady have either been selected ahead of Jacko (generally at the start of a season) or signed with a view on upgrading on him, and we end up defaulting back when it doesn't work out brilliantly - although that said, Evans was our best player for the first three months of last season. I think we all know that he is extremely limited going forward so if you like it's an obvious "upgrade" if you can bring in someone who can do the defensive bits and offer you more in an attacking sense into the bargain. I would guess that is his theory and why he has tried numerous alternatives.
There is no excuse for him ever preferring Edwards there, that is mental. Given that he has never been able to play there, going back years before Ken even arrived at the club.