There is a sort of abandon to the S/V that has helped. It's not just the amount of times he gets to the net, its at what point does he rush the net.. For instance, in the old days at breakpoint down, you would almost never see him rush the net, but he has this tourney and its helped a bit. I thought it helped him win the qf and sf against Raonic and Stan for instance.
There is still a fine line though on what type of approach shot to ride in. Against the Nadal/Murray/Novaks of the world, you just can't get away with coming in unless the approach is perfect. So as a coach you want to preach fearlessness, but then you also need to put some restraint (and this can lead to confusion and hesitation)
Anyway, I still think he won't win another major unless he works on the fundamental reasons he's not winning anymore, and thats the IO forehand and weak returns (particularly the 2nd serve return, we saw a great 1st ros at wimbledon).
At one point, you have to put it in his mind that he needs to put some weight behind the bh return. I don't care if it leads to more shanks, I want to see some return winners to at least get the opponent thinking. Roger has a tendency to just block it back or slice it, which doesn't work against a slow kicker as the whole tour now knows. I mean he probably has one of the worst bh 2nd serve returns on tour and probably loses 80-90% of those points, and this on relatively routine serves. It just can't happen at this level.