The 2015 series is a really interesting case study of Brendon as a leader. We should have won that series 2-0. In the Lord's Test, we were 403-3 with him at the crease, he slogged out, we were 523 all out when we should've scored 600 and batted England out of the Test, and we ended up losing by 120 - the nadir in that Test being Trent Boult ramping one straight to deep third man when we were trying to bat out time. The all or nothing approach does need to be tempered at times, or it can go horribly wrong. That's going to happen to England at some stage.
I think there's a lot to be said for enjoying their cricket. You spend so much time away from home and in environments that might seem enjoyable, but become hugely monotonous. I think the split Test/limited overs coach thing is the model going forward, too. Different voices, taking workload off coaches/allowing the best ones to do IPLs etc plus international sides, specific skill sets etc.
True on the home advantage, the Ashes will probably be much closer than I gave credit for. I just don't think England will score many runs. But I would wager a fair amount of money that England will win in NZ, they'll love the conditions here and our Test side is at a low ebb.