Actually, Roots 7.0 is configured to have Grunt create minified and unminified assets depending on how you run grunt. Furthermore, depending on your server variables, Roots may not be setup to use the assets you prefer.
Roots 7.0’s new Gruntfile.js specifies two sets of JS/CSS assets for Grunt to build: one set is minified for use on live sites (e.g.,
main.min.cssandscripts.min.js) and a second set is not minified for development and debugging purposes (e.g.,main.cssandscripts.js). If you define theWP_ENVvariable as described a few posts up then Roots will use the unminified assets, otherwise it will use the minified assets.
So it seems you probably have define('WP_ENV', 'development'). View the source of your dev site in one tab and comment out that line and watch what magically happens 