Indeed, I think a lot of raidframes (Constie's included ofc) look great in some still shots or at small raid sizes such as 10 man. But once you go up in numbers and more notifications, different colours and general space are added it all looks a bit much for me. Then again I'm not too familiar with healing so perhaps I'm just showing more information than I actually have to.
Thanks! Though for the moment I've given up on the healing aspect of the game. Maybe someday! :P
Not really following your idea there, though
pretty much says it for me. Too much going on for me personally.
Also, I'm sorry to hear that you've quit doing something because of a toxic community. I highly recommend joining a stable raiding guild. It could take a few tries but eventually I think you'll find your place perfectly
I have tried vertical but at some point you have to cut off the row for it to be somewhat efficient.
As a rule of thumb: try thinking of what information you actually look at when you play and what information is important/useless.
As an example, do you really need to see a horde/alliance symbol on your unitframes? Same goes for quest icon, combat icon, etc.
This is all subjective and up to you to decide what you want to show/hide. But if you find yourself never looking at a certain part of your UI or if you get that information elsewhere, don't hesitate to hide it. You can always go back and show it again if you're missing it.
To align and center stuff easier and more precisely you can download Align (it's outdated but works perfectly).