I have not been up Vivian to Gorgonio since the latest snows, but you can rest assured that a deep and distinct trail is established to the summit on that route. You will be well prepared with the equipment you list. May not need the snowshoes, and microspikes might do in place of the crampons, but who knows? Better safe than sorry!
A week ago there was about two feet of snow on the divide near alto diablo at ~10,500 ft with intermittent crust that would support a 200 pound hiker with basic MSR snowshoes even in the afternoon. A couple days ago on momyer, the trail was still holding more than a foot of hard crusted snow from around 9000 ft up, even on sunny south facing aspects. Be safe and enjoy! It’s beautiful up there now.