So, to simplify, I think the reason a lot of developers roll their eyes at another new language is because the problems the languages are solving are less important than the fracturing they make in the engineering community.
If you think a language is missing something, why not contribute to the language with an RFC. C++, Java, and PHP have all been advancing significantly over the years. Or why don't you get together with 100 other language-makers and come up with a unified solution?