When playing with national objectives, another advantage is increasing the number of units you can place allows for the option of infantry spamming for a slow and steady push to Moscow while keeping your Western flank secure.
The downside of course is of course is if the US focuses on the Atlantic, the allies can mount a massive threat to France. Success in North Africa increases what Italy can contribute to the defense of France while decreasing the UK’s threat, but this is hard to maintain if the US goes KGF.
My two cents would be to not place until round 2. Germany is already tight on funds round 1 without bonuses, plus it gives you a chance to see if the US focus will be Pacific or Atlantic.