Possibly. Personally I've always liked the idea that the HSH's power wasn't passed down genetically or only limited to Bashenga's bloodline. You go through the trials, get the herb, and get approved by Bast, giving you powers. The kids are born like any other human and have to prove themselves like a regular Wakandan would.
I still think you'd have to go through the trials and everything. But with that much of the herb built up over generation after generation, it's pretty much in your DNA.
The herb isn't the thing that can make you kick ass or make you a great ruler though. It can enhance you but you still have to train and prove you are worthy of being king.
Yea I could get behind that if a writer formally introduced it. There's more than enough there to justify it, I just really like the egalitarian aspect of being Bast's champion. You know, among all the people, only one can be elevated and given the power of their gods. Having innate physical superiority kind of detracts from that for me even if there is training and rituals involved but it could be really cool.
Priest's run was weird because if only members of Bashenga's bloodline could be BP then the idea of the trials loses a lot of legitimacy. Why have it open to regular folk if they'll just die after winning? It never made sense and seems to have been ignored since then because when T'Challa was no longer BP there was a panel where S'Yan expected Storm to replace him. I think that was isolated incident that can be explained away as either Killmonger lying to give Kaspar his synthetic version or Bast herself explaining how the herb works.
It's got to be more than Bast. If it were just her, they wouldn't need the herb. T'Challa held up very well against 3 enhanced people and a pretty much superhuman KP in David Liss' run and he took at direct hit from Phoenix-Namor in AvX. He wasn't ruler at either time.
Bast can give you a power-boost certainly but with centuries if ingesting an irradiated plant, that has to alter your DNA and make you enhanced.