just stop it with the reboot shit and instead just make a new show featuring a different slayer

From the article:

"Buffy the Vampire Slayer: New Sunnydale,” would have starred Ryan Kiera Armstrong as the new slayer, with original series star Gellar reprising her role as Buffy in a recurring capacity.

I think the article is flawed in calling this a "reboot", since it was supposed to be exactly what you asked for: a new show focused on a different character, in the same continuity of the previous show. But the point is moot, given that it's dead now anyway.