I really don't get all of this 'he'll go down in my estimation' stuff from a few posters. They talk like he was a fan of Brentford. He never was. He did his job, was given the overwhelming backing and support of an owner and DoF and won over fans, mainly by being successful, but also being very personable. That's also part of a manager's job these days.
The reality now is he's an out of work manager who won't be coming back here. At some point, he will want another job. If Fulham were interested, he doesn't have to move house, it would be a job in the PL and he'd get a decent wage.
I can't stand Fulham and hope they go down, whether he's at the helm or not. But I wouldn't begrudge him a move, nor think anything less of him if he goes there.
It doesn't change one iota what he did or achieved here. Nor does it make him a different person or a Fulham fan.