I don't think he had a grudge he was probably just making sure he generates a salary for his wife and kids its a short career in rugby league for most players. For me the first time around he must have been frustrated in knowing he wasn't quite good enough for the standard of our playing squad, as already mentioned he fitted OK in the Wigoons style of play, Cunningham had us going towards a similar style and so Matty came back on the agenda.
Its that lack of creativity that Holbrook must have seen straight away and lost first selection, Matty did a lot of good things with the club away from the first team so it wasn't another total frustrating failure with him at the club.