Well written...
I would just differ on 2 points :
Attack : if it's daylight and nice weather, I would just shadow the convoy from safe distance and plan a night intercept. Had bad experiences with daylight attacks...
Evasion : I found that I get away more often undetected by diving at slow speed (1/3 then slow) from start as I found out that even short bursts at flank speed when diving away would get me spotted.