Okay, here goes.
I would agree with this statement. God Choose Mary through whom Christ would be born and Christ is absolutely essential to my salvation.
Harder to say if I agree or not because I am not on that forum so I have no idea if the statement is objectively true.
Do I believe Mary is the New Eve? Yes. There are writings from the Early Church that indicate this as well as scriptural typology.
Dispenatrix - I could not find this word in any Catholic dictionary nor the dictionary at all. Probably meant to use the term Mediatrix?
Mediatrix is not a term I like to use. It is a term that brings up immediate thoughts that are incompatible with Christianity. When defined, it is not, but I think the term is misleading and do not care for it. If you wish to get into the definition of the term, I will, but I think you are just trying to see if I agree with this person, yes?
I agree with this statement. Mary is not dead. No saint is dead. Scripture tells us this. (Lazy, and rushed, but will provide scripture if you like

)
Not sure what he is defining as “essential role” so can’t say.
I disagree with this statement. I know that I knew Jesus before I understood Mary.
I do believe however, that as scripture says, understanding Mary is only magnigying the Lord. (Luke “My soul magnifies the Lord”)
I do think it is a shame when Protestants do not give the Mother of our Lord respect, to seemingly distance themselves from anything Catholic.
Scripture prophecies that all generations will call Mary blessed. There is nothing wrong with doing so, although I find it interesting that usually the same ones who do not believe Catholics are Christians, never use the term blessed, so if it weren’t for the “non-Christians” in their eyes, this prophecy would not have been kept:shrug:
I do not need a mediator except Christ. That is my immediate reaction to that statement. Even though there is valid Catholic theology, with scripture that I could provide to explain that statement, I think this is not an effective way to explain the Catholic position. I don’t care for that statement since I feel it needs too much explanation to make it valid with non-Catholic Christians.
I disagree with this statement. I think that there are many Catholic Christians who don’t care for his statement since it has misleading implications that are long and laborious to explain. We are not embarrassed by the traditional Catholic position. We just do not use the same words because we are completely aware of what the non-Catholic “hears”.
This statement is false. A person can be a canonized saint without every word they ever wrote being aproved as “correct”. St. Augustine is a perfect example. He was a “doctor” of the Church yet there are things that he espoused that the Church disagrees with. Examples can be provided if you wish.