I think Larian only has themselves to blame. They focused so much on the other companions and then wondered why people didn't get attached to Wyll. If you're not paying too close attention, it's easy to miss him as well. Lae'zel, for better or worse, makes an immediate impression, you cannot ignore her. I hope they can fix Wyll, because it'd be a shame to have a lame duck companion in an already small cast.