I'm missing a, to me, obvious option for the connect app (and maybe the newer watches?) ...
When I'm running - using my arms, in and out of bright sun and shade, possibly paying attention to technical terrain, sweat in my eyes ... you get the picture - there is no way I can read the millimeter-sized text on the watch screen telling me what the next section of my training program workout is. I could really use a voice cue at the start of new workout sections/intervals saying things like "speed up, 2 minutes zone 4".
I used to have this feature on the now sadly discontinued adidas micoach app, and I loved it.