In my first game, there was some battles around Caen, I abandoned Utah Beach (too far from reinforcements), and then Germany threw as many starting forces at that beach as possible, whilst I concentrated my reinforcements on the British and Omaha, who got their reinforcements faster than the Americans-it was a battle of attrition that the British could not win, especially with British tanks defending at two, and once most British forces have been destroyed, the Americans have finally broken out of Utah Beach, and easily took Cherbourg-no matter, the Americans and British couldn’t take Caen or St.Lo.
As for aircraft, I tried to avoid as many artillery pieces as possible (in hindsight, I was overly cautious regarding this), and I concnetrated as many fighters into a single zone as possible.
Another thing I want you to think about is my policy (I control both sides) for both sides, where I delay reinforcements until the single unit (usually a division, but sometimes Werfer brigades), units made up of one piece (such as the British armoured brigades) are moved immediately after deployment. I just like doing this, because I think that reinforcements not be poured in piecemeal and destroyed piecemeal, as I feel like this is what happened in real life (even if it didn’t, I still would like for divisions to operate together, even if individual units aren’t more powerful when operating within their own division. Is that a good idea? I look forward to hearing your response!