Sorry, but i couldn't disagree with you more.
Danny Philliskirk is one of; if not the, hardest workers in our squad.
I'd imagine if the Opta Stats were published for our sides at our level; he'd be out in front for distance covered and for max output sprints.
IMO he's our most talented footballer,and also out hardest worker. I actually can't believe you think his workrate is poor. He defends from the front; and he's been one of the key players in getting our quick tempo going; and working our high press (when we were on form)
The difficulty in having brought in Daniel Johnson is his best position is the withdrawn striker / advanced midfielder role; which also happens to be Philliskirks best position too.
Danny P can also play upfront outright; as shown by the Rochdale away game in which he was outstanding, but - i wouldnt say its not his best position....so LJ brought in a player to directly compete with one of our best players for the number 10 role.
To open up sides at our level; you do need players who can provide a spark; or who can weigh in with a goal or 2. But, at our level especially; you also need those players to contribute to the sides shape; work ethic and game plans. Danny P does that, Daniel Johnson, from what i've seen, doesn't.
I'd try and find a formation that both can play in; but - if its a straight choice in the current formation; then i'm Danny P all day...