Clearer, and more succint:
A lawsuit based on these claims would have no merit.
Problems with the summation statement quoted:
"At the end of the day" is superfluous and pedantic.
"In this situation" is ambiguous and suggests that the statement only applies in the limited context of the facts raised in the letter, i.e., ignoring other potential facts which were not raised in the letter.
"just" is superfluous, pedantic, and unprofessional.
"a really bad idea" is superfluous, pedantic, and unprofessional. It is a really bad idea to use "a really bad idea" in a legal letter written to another lawyer.
The reason I like the phrase is that it encapsulates the fact that this is wrong legally, from a PR perspective, morally and that there's much to lose and little to gain.
Agree, but the letter is not just written to the other lawyer, but to the Internet community at large, including potential clients. That audience will react better to the more colloquial statement.
Problems with the summation statement quoted: "At the end of the day" is superfluous and pedantic. "In this situation" is ambiguous and suggests that the statement only applies in the limited context of the facts raised in the letter, i.e., ignoring other potential facts which were not raised in the letter. "just" is superfluous, pedantic, and unprofessional. "a really bad idea" is superfluous, pedantic, and unprofessional. It is a really bad idea to use "a really bad idea" in a legal letter written to another lawyer.