Being a March/Dan/Hysilens/Cerydra fan must feel like absolute shit, the VERSION TRAILER barely shows them off and instead focused on Elysia (recycled design from HI3rd)
Hoyo is not being subtle, if you're not a HI3rd Expy your existence barely matters.
I bet they regret making the Stellaron Hunters which is why they have been written off the plot and only appear to sell merchandise and keep people semientaged: they know that they're vastly more popular than any of the HI3rd flops they could export and they hate them for it.