Moving off Meteor improved our load time by 87%

Yes, implement server-side rendering, tracked here in Meteor's tracker: https://trello.com/c/Lz07fBAm/7-server-side-rendering

Meteor is almost there. It's inherently isomorphic and its Blaze templating engine (a fork of Handlebars) can run both server and client side. They just need an easy way to render those templates from routes defined on the server side.