Gayle, who was booked for time wasting, then received a second yellow card after making contact with Steer as he slid in to reach James Morrison's cross.
He said: "Those two games were teams that were out of sight".
"There are lots of positives that we can take and build into the game on Tuesday evening and that's what we will do".
"Even the manager was so confident that we were going to score one, two and three goals as well".
"That's what they did for the first 15 minutes against us and we weathered the storm because the momentum and atmosphere in the crowd were very good".
Dean Smith, meanwhile, says his side will not sit back and defend their advantage as the Villa boss targets another victory over West Brom this evening. "That's the approach we need". On the road Villa are unbeaten in seven games and in their last 10 away games their record sits at 5-3-2. Villa were anxious they would be without Tyrone Mings after he tweaked his hamstring in the first leg, but Dean Smith has confirmed that he should be fully fit for Tuesday's decider.
Villa eventually held on to secure a 2-1 win ahead of heading to the Hawthorns on Tuesday night for the second leg. "We've got a full game to go and do what we need to do to get what we need.it's not a result that's come from a lack of hard work".
"I wouldn't have played Glenn Whelan on Saturday", the pundit and ex-Leeds United striker said. "We have to go there and play our game and be confident".
Abraham, who scored his 26th goal of the season on Saturday, admitted the forward's absence could be a game changer. Hourihane is that player as he gives you a goal threat and can create as well.