It'd just come off as pretty "Joss is getting desperate" at this point if it happened.
Buffy/Angel are some of my most dear shows of all time, just...ehh, I dunno. You wouldn't want it done without Joss, I don't even really see the point with Joss...
Would be cool to see Sarah in something major again, but yeah, not so sure I have much interest in seeing 40 year old Buffy, Willow and Xander running around leading a bunch of the younger Slayers from S7 in international demon-hunt-y-ness.
Some Fray adaptation could be cool, or an otherwise "_____ The Vampire Slayer" in some other time period, but ehh.
Frankly, I'd way rather just get that Ripper spinoff that was reported as a possibility years back. Something's happened over the years to send Giles back into his darker self (sort of in that latter-Angel-seasons Wesley mode), set it in the UK, older Giles separated from Buffy & Co going about the good fight. I forget, did Ethan Rayne show up again after getting locked away by the Initiative in S4? Could bring him back as some major antagonist, or even sort of odd-couple allies thing if he's had some big life re-evaluation. You could even factor in the main Scoobies into it in cameos down the line or something.
But yeah, definitely no new-showrunner/re-casted Buffy reboot, **** that. Maaaaaybe it'd be worth continuing with Joss and the originals, but even that's seeming unlikely and a little pointless. S7 was basically a perfect ending for things anyway.