So far I'm loving the UI but have a few minor issues.

When using OmniCC with Buffs and Debuffs enabled, OmniCC will override all of the text options related to CD's.

When loading into the game, holding right-click to move the camera will cause the game to suffer severe performance issues until I mouseover something to generate a tooltip for the first time that session. After which point everything is fine until next /reload.

I'd like to see the totem timers function like the default blizzard totem timers do, where right-clicking on the totem timer will dismiss the totem. If I have to pop earth ele for example, but need to dismiss it before the next pull, I have to use a macro to destroy the totem, as right-clicking on the LS: UI totem icon does nothing. I'd also like it if the totem timers were a separate module under unit frames, instead of a lumped in with buffs and debuffs.

I'd love the ability to set a custom health bar backdrop color for missing health, as right now it's simply just the frame texture. I have vision problems and usually set a high contrast backdrop of red to a green health bar.

Hi!

I'd like to see the totem timers function like the default blizzard totem timers do, where right-clicking on the totem timer will dismiss the totem. If I have to pop earth ele for example, but need to dismiss it before the next pull, I have to use a macro to destroy the totem, as right-clicking on the LS: UI totem icon does nothing. I'd also like it if the totem timers were a separate module under unit frames, instead of a lumped in with buffs and debuffs.

It's done this way due to technical limitations. There's some hacky workarounds for this stuff I might consider adding, but that stuff can break at any moment, so we'll see.
But you're legit the first person even who asked for an option destroy totems. I'm not familiar with shamans, the last time I played mine was in legion, but when I asked my friends and UI users who mained shamans if they needed the feature, it's basically a unanimous no 😅And when I played my shaman I usually had my elems as macros no mod for summoning and alt mod for dismissing, I still use the same approach with my DK and corpse explosion or other, let's say, "pet consuming" effects.
As for its placement, just move it with a mover. I don't really want to add it to the unit frame because there's already the main power bar (bottom), the additional mana bar (top), so totems would still be buttons floating somewhere around the unit frames 😒

I'd love the ability to set a custom health bar backdrop color for missing health, as right now it's simply just the frame texture. I have vision problems and usually set a high contrast backdrop of red to a green health bar.

Hmmm, I this sound like a good idea 👍🏼

When using OmniCC with Buffs and Debuffs enabled, OmniCC will override all of the text options related to CD's.

That works as intended. Trying to juggle two addons that affect the same UI element is a recipe for disaster, it's a massive pita, so I completely disable my cooldown customisation if I detect that a user runs OCC.

When loading into the game, holding right-click to move the camera will cause the game to suffer severe performance issues until I mouseover something to generate a tooltip for the first time that session. After which point everything is fine until next /reload.

This is super bizarre. It could be some blizz bug or something, I'll look into it.

Fair point on the OmniCC thing.

Really the only "totem" I've had issues with this expansion is Earth Elemental and the old macro hasn't been working for me at all since DF launched (I assume it's because of how both /click and the totem bar was changed). If I could find any other way to dismiss earth ele right now this would be a non-issue, but there are a few niche circumstances (primarily M+) where I'd need to be able to dismiss it.