Nevermind what Reed's planning. That's OBVIOUSLY going to fail.
What NORMAN should be doing is instead of p.o.ing Franklin, he should be getting on FRANKLIN's good side. Because if Franklin's powers are coming back...at least Onslaught/Xavier had THAT much good sense...
You know who would be the perfect teacher for a repowered Franklin? Not Agatha Harkness. Not Professor Xavier.
UATU. His race operates on a high Guardian-level power level, and if Franklin misuses his powers, it could potentially even threaten Watchers. He IS allowed to act against dangers against his OWN people. (Anybody remember the old Tales of the Watcher series that used to run in the back of Tales of Suspense? The time some lizardoid aliens threatened a planet, smug in the fact that the Watcher wouldn't do anything---only to find they were attacking the Watchers' home planet? What happened to them---isn't pretty.)
Uatu's creed of noninterference is exactly what you want to teach a near-omnipotent kid, too.