First thing would be moving the chatwindow down. Get a mod (Prat, ChatMOD), that allows you to move the input bar of the chat above the chatwindow itself for this.

You display your buffs on three different locations (center-low and top-right). One should be easily enough (ideally outside of your focus if you don't need to check them the whole time).

Your unit frames don't display your target's name? Or is this only because you targeted yourself?

Questtracker should of course not overlay your buttons

You have many icons of add-ons in your Fubar - how often do you really access them for configuration? If not more than once a week I would rather use the commandline or Rock for configuration and remove them from the Fubar.

Things like Smelting, Track Nodes, PoF, PoSP are things you don't usually need quick access to during the fight. Personally I use Geist to hide them (I still can access them with one keypress, but they aren't cluttering my UI). Same with your keyring - you don't access it that often, do you? Add-ons like Bagnon give you the option to access your whole inventory with one button (including keys).

There is a hole in the middle of the lower row of your buttons, which is more or less wasted space.

I would remove the background frame of your combat text mod, without it it will look much smaller. Same with Grid.

The trinket bar should be moved down to the unused space next to your button bar - or ideally somehow integrated into your button layout. I would also remove buttons which you have hotkeyed already (I know it is hard, I'm guilty of this myself).

Not exactly an AddOn but a Macro question:
I´ve got two diffrent idols for my druid I want to be able to switch between them easily. To do this I came up with the macro /castsequence Idol1, Idol2 which works just fine. I would like the button to show the item I´m currently wearing instead of the one I´m going to switch to if I press the button though. So the question is, is there some #show option that let´s you show the item you´re wearing in a certain itemslot (e.g. #show itemslot:18 or something).

Thanks Decius and Ajuga. I am currently adjusting these, taking a look at some of the clutter options I have, and I'll repost for your perusal tonight!

Assuming you'd also like to see the tooltip text instead of the macro name,
should work. Basically, any modifier which applies to /cast, etc. can be applied to #show or #showtooltip as well. You can also use
as your casting macro to alleviate the need to switch idols explicitly. The idol will affect the spell you cast (always for non-instants, most of the time for instants), but will incur a GCD, such that if you cancel a spell with a cast time, you'll have to wait for the GCD to finish. This obviously only applies if you actually equip the idol (i.e. you're switching spells from one that used a different idol).

Um, since I'm using this code in particular, pretty sure it works.
You should be able to do the same for #showtooltip, I.E.
When you have IotAH equipped, this will: Show IotAH, equip IotEQ.
When you have IotEQ equipped, this will: Show IotEQ, equip IotAH.

Substitute your idols as necessary.

I literally copied the macro and replaced every instances of Idol of the Avian Heart with my Idol of Terror and Idol of the Emerald Queen with Everbloom Idol (I even used shift+click to make sure there´re no typos) - it didn´t even work for switch the idols let alone showing the correct icon.

edit:
It seems like [noequipped:Idol of the Avian Heart] always evalutes to true, as there simply is no slot named "Idol of the Avian Heart" that could be equipped. My bet is your line
behaves exactly as a simple would. The condition does nothing really.

Odd. I'll check syntax as soon as I get home to make sure I'm copying my macro right, and see if I can come up with one that does what you need. You don't have any macro-affecting mods, do you?

[edit]
So I've played around with these a bit, and I can't get a macro to work like this either. For one,
shows nothing. If I change it to
it always shows the second idol, saying that the first idol evaluates to false, even when equipped.

Second, a similar problem shows up when trying
It will hang at the Avenger. Which is odd, given that the macro I posted before only equips Avenger if it's not equipped already, though it's also not trying to equip another idol. I'm going to post this in the UI forums on the official site to get some feedback, as this kind of ability seems like something they'd be okay with.

i`ve got a small question.
is there possibility to save 2 or more different ui-settings, not only for one addon.
thx 4 help

@ Midnight / Adoriele:

Tried /equip item:12345 ?

Equipping stuff isn´t the issue - /equip itemname works perfectly fine. The condition to check wether a certain item is equipped or not is the problem. The [equipped:X] condition only works for whole slots/item types (eg. Idols, Shields etc) not for specific items. My question is if there´s a way to force showing the exact item worn in a certain slot in a macro.

The last time I saw that macro (this morning) it was /echo rather than /print.

The rest is the same.