Having rigged boats for 15 years I have come across a few situations you speak of. All of those situations were due to improper alignment with the hull. If the leading edge of the motor's trim plane is PROPERLY aligned with the trailing edge of the hull, that situation will not present itself. And there is some math involved here. The equations are different for every hull. Most riggers do not take the neccessary time and effort when placing a bracket, and use a "standardized" approach. Which is usually raising the motors too much. That, in turn, leads to the problems you speak of.

Outboard brackets are not ancient technology. And some boat manufacturers are only switching to molded transom brackets because of the reasons above. Dealers no longer have to take the time(if they ever did) to PROPERLY bolt on brackets and then mount the motors.

Just my experiences,
C.