I hate to bust your bubble, but your grammar is absolutely horrible. The fact that you say that you are a lawyer does not help the matter one iota. Let me be the bearer of bad tidings for a brief moment.
1) "This is a modern and incorrect utilization, although regrettably and progressively basic." First, there is no need for the comma in before your transition word "although" since the second part of your sentence is a subordinate clause. Second, the terms "regrettably progressively" are two adverbs that require a comma in between them.
2) Semicolons, and other punctuation, NEVER occurs in American English after the quotation mark unless you are writing English in the UK (i.e., "in itself"; should read "in itself;"). Again, paragraph two has the same mistake ("as such";).
3) The use of the word "reciprocal" is incorrect every time that you use it. I think you mean synonyms.
4) In paragraph three, you need commas ("By method, for instance,) because the clause contains information that is unnecessary.
5) In paragraph three the word "right" should read "correct" since right is a direction.
6) In paragraph three, again, there is no need for a comma before the conjunction "and" since the second part of the sentence is another subordinate clause.
7) In paragraph three, the word "just" is not the appropriate adverb since the word "just," in your context, does not denote time, manner, place, or degree.
8) Paragraph four is simply incorrect and should read: "I am a lawyer, and, as such, I am formally qualified to express opinions about legal matters." The mistake lies in the fact that the phrase "as such" is unnecessary. Refer to number four.
9) Paragraph 5 is incorrect for the same reasons as numbers eight and four.

Now that our grammar lesson is complete, allow me to address the usage of the phrase "as such." As such has multiple meanings, all of which can be used to avoid ambiguity but must be used in the correct context along with the correct meaning.
1) You may use as such with a negative to indicate that a word or expression is not a very accurate description of the actual situation.
2) You may use as such after a noun to indicate that you are considering that thing on its own, separately from other things or factors.
3) Here is the literal definition of the phrase:
1.
as being what is indicated or suggested
2.
in itself
4) The only other time the phrase "as such" can be used is at the beginning of a sentence to denote subsequent or consequent behavior of a person, place, or thing. That being said, this usage is still incorrect; however, we tend to look past this rule for the sake of legal language as well as other technical writing, such as medical.