somewhat off-topic, but if you can't deal with invocation or rune, it's better to take incanter's ward and never use it. the passive is still more than if you would not use invocation perfectly.
as for UVLS. it's strong, I give you that. but we haven't yet seen the 5.4 trinkets. and this isn't the first time a previous tier trinket was BiS for the next tier. for example. hell, ret paladins used greatness for 3 tiers back in WotLK. and remember how volcano was BiS as well for most of Cata?