The sub was bad, because it messed up the entire lineup. Taking out Kane that early, was not a good idea since it forced 3 or 4 players to shift their position. Ireland bossed the game when he came on and Diouf had a few dangerous headers, it seemed like a matter of time, especially when they got the lucky pen.
It wasn't an idea. Poch was forced since Kane had a calf injury.
It made sense after Kane came off, because he seemed to be lacking that burst he usually has all game.