Put it this way: Kenny moved Johnson to left back in order to accommodate Kelly. In doing so he also had us play 3-5-2. That's a lot of shuffling, and while some of it was clearly intentional given the style of play Kenny wanted to play, it speak volumes for how much Kenny rated Kelly (and rightly so as he's been probably our best and most consistent player all season).
Don't you think the boss would have done the same for Pacheco in these times when our front line has been rather thin had Kenny rated him as much as he rated Kelly?