If this PR merges and it has unforseen bugs / issues, I'm not sure anyone would have the time to jump in and fix it. So, that's why I'm being cautious about approving/merging it.

In general I question I lot the need for this and its usefulness, as short names are usually useful only in short blocks with 1/2 params, otherwise the readability of the code is impacted a lot. We already have a good shorthand for blocks with one param (at least in the most common case), so it feels to me we're complicated the parser/syntax without a very strong case for doing so. Many features are useful to some extent, but we should also keep in mind that none of them come for free.