The more I think about it, the more I do think there's going to be as many bad days as good as England coach. His record IS scratchy to say the least as a T20 coach, although that's not exactly a format you're able to produce a lot of consistency in as a franchise leader. He certainly isn't used to leading a side with the mental and technical frailties that England has. Coaching them will be a lot different than guiding us out of the hole we were in back in 2013.
And OK, hand on heart I'm an unabashed Brendon fan. I just can't see how anyone can look at what he's chosen to do and not be at the very least in admiration for the willingness to take on a challenge. Money is no factor for Brendon. He currently lives the cushiest of lives, living with his family in NZ, training horses, talking crap on the radio and TV, flying around the world for the occasional franchise T20 tournament and playing golf the rest of his days. He's given up some of that, uprooted his young family, in the pursuit of something he has a burning desire to achieve in. In a world where (understandably) coaches and players often go the easy route for the cash grab, I think that's to be admired. It's definitely not the norm.
I think best case scenario, he comes in and repairs some of the breakdown in that England environment, whatever that may be. He plays a part in identifying the guys at first class level who can come in and be successful. England starts to potentially win those series' like the Windies ones that they should be winning. He's not going to be an Ashes hero nor make WTC finals I wouldn't have thought, but I think he can leave the side in a better state than he found it.