There was obviously a lot more for him to do like being an Avenger and dealing with the consequences of opening up Wakanda. Not to mention missing out on seeing his interactions with Reed Richards or Storm. But all of that is kaput and a reboot won’t happen for a long time. So yeah, as far as I’m concerned T’Challa got screwed the hardest. Screwed with a capital S. All I can hope for now is that he remains prominent in the comics and doesn’t end up going the way of Hector Ayala.