Conceptually speaking Shuri is a great concept and ambassador for the BP brand but you have a subset of creators and fans that are hellbent on her replacing her brother rather than building her own niche within the BP ecosystem. They want his rogues, his storylines, his supporting characters, and his place as the center of the mythos. These “fans” existed before Boseman’s passing and Marvel’s decision not to recast opens the way to her (or whoever takes the mantle for that matter) to displace T’Challa, as for many people as long as the lead is black nothing about the BP franchise changes.
The only hope is that the comic division understands who is the main draw of the BP IP and continue to position T’Challa as a strong lead, so in the next decade (or 2) we can get a comic accurate portrayal with great stories of his own.