Pretty good reactions.
About the coaching. You could be right that breaking balls risk damaging elbows, but these days you gotta throw them, and the more spin the better. My impression of Crawford lately is that his pitches don't break much, thus 12 dingers in his last 3 games--all post-ASG. In his last 3 starts before the ASG he went 7, 7, and 6 IP giving up 1 ER and 1 dinger. Post-ASG has been an absolutely unreal turnaround in the wrong direction.
Bello, on the other hand, is about the same before and after the ASG: 18 IP and 9 ER before ASG and 17 IP and 8 ER after. Pivetta is also about the same before and after: 10 ER and 15 IP after the ASG and 9 ER and 17 IP before the ASG. Houck is better post ASG: 22 IP and 7 ER before ASG and 26 IP (4 starts) and 3 ER after ASG.
The bullpen, on the other hand, has been mostly awful since the ASG break, and part of that is because of injuries.
Interesting comments on the hitting. Breslow did nothing to help it, but they are better. It could be the hitting coach, as you say, but I also think it's Cora's willingness to load the lineup with lefty or righty bats, depending on the opposing starter, and then to bring in other bats when the opposing manager goes from a lefty starter to righty reliever or vice versa.
Plus this off the wall comment. The five worst DWAR's on this Sox team belong to Devers, O'Neill, Yoshida, Smith, and Refsnyder, and my impression is that Cora has no hesitation in playing any of them. Yoshida has yet to play in the field, but gets -0.5 DWAR because of it.