You mention traffic alerts. This is one reason I am having issues trying to adjust to Discover Media navigation limitations. I am seriously thinking of installing my trusty TomTom 6100 and giving up on the Discover app.
TomTom give you a coloured line showing the start and end of all traffic congestion for your own direction (in red), and for the return dirrection, in orange). These colors overlay the preset route....
Re Routing is also automatic. and a separate side window indicates several miles in advance the distance ahead to to congestion, speed cameras, and poi.
Speed cameras get a tripple ping too and the updates immediate - are over their network.