I didn’t play BOTB or D-day but I realy like GC, I find the system of taking actions very interesting toward tactics, and with a regular AA game you have too long waiting poeriods if its not your turn.
But on the other side I have my doubths about the victorypoints system I often play to total destruction.
If playing J I often find the A bombers a bit to strong because your naval units have very little air defence.
But grate game, ideaal for 2 and you don’t need 5hours of time to play a game!!!