It would be extremely beneficial not only for the newcomers, but also for us to make better abstractions for the language constructs and grammar rules to have smth like this https://262.ecma-international.org/15.0/index.html?_gl=1*16li5ep*_ga*ODI5MDAwODI5LjE3NDI5MTcyMTU.*_ga_TDCK4DWEPP*czE3NjI0MzMxNDckbzgkZzAkdDE3NjI0MzMxNDckajYwJGwwJGgw#sec-ecmascript-language-statements-and-declarations 

This will simplify navigation, communication with the users in the aspects which language constructs we support and which not.

It will also simplify inner and external development / improvement of the tools, like formatting or refactoring of the AST:Nodes and grammar rules.

Moreover I believe it'll help us to articulate needs for the "new" parser better