I agree Doc’s intro sucks quite a bit which surprised me as I completely forgot all about it before watching this episode. He has a few more less than stellar scenes in the future so be ready for that if you decide to stick with it (not a huge amount if I recall correctly). That said he does become a proper character with his own things happening in the background eventually - to the point I actually found him to be pretty interesting in terms of the overall plot. I don’t know how they’ll handle him in the anime considering its pace but he does improve in manga. They seem to stick closely to the most important parts of the story so at least some of his “good” moments should make it in.