I think it could be beneficial for height/top speakers to even play lower. Maybe not too. One reason I thing that’s true is there is an atmos demo that I’ve use where a mixer uses his voice as an object and basically does speaker ID while panning around the room. When he goes to my RSL c34e’s his voice gets tubbier. Those speakers are crossed higher than my bed layer and I’m sure that’s why they sound that way. I’ve never noticed in regular content, but it’s annoying in the demo.
Here’s a link for his second one. It’s a lot of fun as he’s using a recording of a Porsche on a racetrack and changes object size etc.
If you go here, the Atmos file is in the description. Since YT doesn’t support Atmos you have to download it to a thumb drive and play it back in your BD player.
The other video is where he only uses his voice. Both are a lot of fun.