Problem with condi Mirage is, that it can do quite a lot of damage with it's clones while being extremely slippery. I think some degree of slipperyness and confusion should stay, it's an illusionist afterall, but we should probably get a few more ways to punish the mirage for mistakes.
With these changes, mirage shoudn't be in an OP state anymore. However, mesmer in general received so many nerfs due to mirage, that gutting mirage will likely result in Mesmer being too weak overall. Some suggestions to introduce a healthy version of Mirage and Mesmer in general
1. Revert the nerfs on Cry of Frustration, Maim the Disillusioned and Ineptitude. Condi Mesmer and Mirage applying condis with their shatters is much healthier for the game than clone ambush spam. It's telegraphed and rewards the Mesmer for playing well and actually landing his skills.
2. Rework Chrono. The last changes were straight up terrible for Chrono and deleted so many builds.
3. Allow some sort of power build that doesn't involve a oneshot combo using GS. Maybe increase damage of Mind Wrack when used with 2 or 3 illusions, so Power Mes can still be bursty without going back into the degenerate pattern of stealth->GS2->MoD->Gs3->F1. Power Mes doesn't live up to it's illusionist fantasy.