It downloaded the major parts of the patch then, and now it installs that patch and completes it with missing data.
But be glad you are not me, the patching stalled at 97% and shortly after the launcher crashed. And guess what? It deleted all data and started over from scratch. Again. So i need to redownload the entire patch for the third time.
Launchers are terrible and shouldnt exist, cryptic shouldnt be allowed to use a launcher platform at all, they are terrible and inexperienced and have no clue of what they are doing. I mean come on, crypic has managed to make the only launcher in existance that fails at patching, apart from having an inferior american hoster that gets very easily overloaded.