One downside to UAC I forgot to mention is that you are perpetually screwed against large invasion critters or the Emperor/Empress in Reim.
Anything 10 levels higher than you or more, you cannot tier up. 0% chance. Your mstrike will go get-it-started and only jab forever at good positioning, with no ability to even manually correct. As a rogue that doesn't matter so much. I am curious to know if the 10 levels problem applies to ambushing from hiding with the free good tier. Can anyone confirm/deny if you still get the good tier on critters 10+ over your head?