I don't see how this is different from having all these pre-bundled with a new version of Zed? Either way I'm going to download all of them again.
[1] Either by embedding cryptographic hashes to the distribution, or by having some means to distribute publicly signed hashes (e.g. minisign via HTTPS).
As if anyone at Zed cares and checks them all thoroughly? Even if they wanted they couldn't, given how expansive Node dependencies get.
At best, someone will report an issue/vulnerability for one of those to them. Usually months/years after it exists.