I would prefer to have the definition of an equal opponent being narrowed down. The set of possible opponents for players with a high level is obviously skewed towards getting weaker opponents, but I would often rather wait (much) longer than getting matched again with some >80% expected win opponent. (My average matched probability has been around 75% last week.)
I think it would be fine to reduce the threshold for a suitable opponent to 7-10 levels. Ideally, I would like to have a slider that sets the range of accepted win probabilities. But (another) button with "more equal" opponents could work as well, so that people have the choice between random, decent, and equal opponent.