I've been arguing that Trump needed to abandon his "light on specifics" approach to the 2016 election for a while now. Whether you love him or hate him, his constant attacks were wearing thin precisely because he wasn't offering concrete positions to serve as a foundation for his rhetoric. Yes, there were details available on his website, but they were fairly limited in scope and he wasn't doing much to promote them on the stump.
Lately, though, that's started to change. More and more Trump has been delivering speeches which, while still conveying his trademark attacks, have delivered a lot of substance as well.