OP, you're making a very basic mistake. It is only in relation to other classes that anything can be considered overpowered. Classes don';t operate in vacuums. No, the changes might not seem like a huge deal to you, but then that would be relative to the other class changes. Which you don't mention.
As an example, you quote : "And for all the guarded by the force/undying rage whiners - it's there since 1.0, even since the beta, and there wasn't a single thread about it before 1.2"
TTK has changed in 1.2. Therefore do you not think the efficacy of this ability has also changed, RELATIVELY?
Let me help you.
rel·a·tive
[rel-uh-tiv]
noun
1. a person who is connected with another or others by blood or marriage.
2. something having, or standing in, some relation to something else.
3. something dependent upon external conditions for its specific nature, size, etc. ( opposed to absolute).
4. Grammar . a relative pronoun, adjective, or adverb.