Not trying to underscore what you're saying but...
a) playing in a div should (in theory) always lend to a better game, but I haven't found it to always help my CV play necessarily.
b) some of my best games have been when focusing 2-4 DD's throughout the match, especially if I use my bombers specifically, vs using my rockets, because I can cross drop the carpet.
c:) I get excited and giddy when I see Russian BB's when I am in Indomitable because, well, FIRES...
As for the slingshotting, I have never used that tactic and don't care to use it. I don't seem to have any issues in any of my CV's not doing this so don't particularly see the big deal. I get the reasoning for people trying to use it, but I think I am pretty good with aircraft management and don't necessarily need to do it overall.
-Hapa