" JS bundle sending on new client connections & client refreshes (improve by adding a ServiceWorker.js file to cache your JS assets, 1 hr of effort)" - or just deliver from a CDN:
In your Meteor startup/server
if (Meteor.isProduction) {
WebAppInternals.setBundledJsCssUrlRewriteHook(url => {
return `https://your_cloudfront_cdn.com${url}&app_v_=${process.env.npm_package_version}`
})
}
If you go this way, just mention my name so I can give you the Cloudfront configuration.