How to improve the actual mirage wish

Everyone's saying that the duplicated old league mechanics inside mirages is great, and I agree, but the actual league mechanic for mirage and wish's is very lackluster, if it wasn't for the duplicated map zone every person would be skipping it.

The one change GGG could make to make it a 10/10 league mechanic, is letting the mirage buff you pick, persist in the actual original map after you clear and complete the mirage.