Just watched a replay. Thought Manny had a very bad night and I thought it was very premature taking Bonavacia off (unless he was injured). Never had control of the midfield.
Manny had a torrid night and might have been given a second yellow by a different referee. I do not think he was coping well with the pace of Polenz who was out to prove himself to the fans and the coach.
I can't blame Ernie for trying to effect a change in midfield. I thought Roly was patchy because he was suffering due to the unfamiliar weather (hot and humid). Possibly bringing Boxall on might have been a better move than putting another attacker on the park, but that is all a post-mortem speculation and I am no Ernie.