Yes, idle-up is good.
I did a lot of indoor hovering with my T-Rex when it was new. Too much snow to do much outdoors. But when I did go out that spring and fly outdoors, I had a heck of a time. I would baloon up every time the wind blew, and getting it back down from altitude meant lower head speed, and less cyclic control.
Brother #1 said that idle up would take care of that. So we programmed it there at the field, tested out the transition from normal to idle up at a safe altitude (yes, it jumped up when I hit it the first time) and then experimented with the different feel, even just hovering. It was night and day. The heli had full cyclic control at all times.
After a few cycles of testing and adjustment, I got it tuned close enough that I could flip the switch back and forth and not see the heli do more than the slightest twitch. Some times I switch in the air. Some times I switch on the ground.

Yes, even in hovering, idle-up is good.

Vince