For me it boils down to Wello being used in a different way.
For Royce he was given the role of being the link man arching round the outside on moves. This is plainly stupid for Wello as he doesnt have the pace to attract the outside defenders. As a result the halves had to literally slow play down to allow Wello to chime into the line. Consequently this killed the move stone dead.
He now appears however to be used more through the middle, acting as a runner coming inside, or running off the shoulders of a player stepping one out from dummy half in midfield This is the way he was used by Daniel Anderson.