McShane, 27, made his Super League debut eight years ago and Powell feels he will “come of age” this term. “He looks like he is reaching his potential as a player,” Powell said of the Hunslet Parkside product, who has also had spells on loan at Hull and Widnes Vikings. “I think he is really maturing as a player. “He has been out on loan a couple of times and been at Wakefield. “They are differing places and some have suited him better than others. “I think he has found a place that really suits him.” McShane filled in at half-back for spells during Tigers’ injury crisis last year and Powell believes his all-round game is improving every season. “He has got variety as a player and his ability to play around the ruck is clever. “His defence is really strong and he has got a kicking game. “I don’t think there’s much he hasn’t got in his armoury. “There’s a couple of little bits and pieces, but he is getting better all the time. “He has been very good at different times in his career, now I think he is right on the verge of coming of age as an outstanding Super League player,” said the Castleford coach.