I think you have answered the point that you were arguing, he's now started scoring = confidence, which has resulted in his best performance which lead to another goal. He's not exempt from being dropped, but he's given Oscar a welcome headache no doubt.
Edit. I see your above post, I get your...
Crofts doesn't have to be on the ball to have a good game, he's there to pressure the opposition, force them back and make them lose possession,getting into the box and scoring is a bonus. Nobody is claiming he's been a stand out player but the performance against Burnley is much more like what...
Nobody is saying that, but he didn't have a bad game against Burnley. Never underestimate what goals/confidence can do for a players game.
But he didn't put it over/wide, he tucked it away. The fact is he made the run to get himself in a very good position.