Features list:

Unitframes:

Change health color to: class, gradient or their selection; i.e. friend/hostile/neutral
Smooth animated health and mana bar
Large frames can be enabled
4 built-in themes available, including Lorti
The user interface can manually be set to a darker shade to get all black frames.
Health & mana texts can be shortened or abbreviated.
Enrage buffs can be highlighted.*

Tweaks (too many to list all):

Combat Indicator: tracks 'fake' combat as well when a pet is send in to attack.
Out of Combat timer: shows a countdown when an arena opponent is about to exit combat.
Built-in aura resizer for buffs/debuffs on Target-/FocusFrame.*
Built-in SnowFallKeyPress that works with Dominos, Bartender4 and default actionbar
Change nameplate name to arena123
Auto accept raid ready checks
WannabeAHK: doubles every key press.
And many more..

* For additional customization options related to buffs and debuffs, use DeBuffFilter addon from my github.

Read Me:

I. This is my personal UI, therefore I will not reply to request.

II. This is not only for Rogues; rouge after all can be interpreted as a misspelling of rogue or red

III. Massive thanks to Knall for his continuous support. All other credits are mentioned on git.

IV. The textures seen under images, e.g. the flat statusbar and PvP icons can be found on my GitHub

I highly recommend to not use RougeUI in combination with other UI addons to avoid possible conflicts, unless you know what you're doing.

You can find me on this discord: https://discord.gg/CtxPasSQnQ