Intake cooling mod. Opinions wanted

From what i been reading and looking at cooling path direction pics is that the water pump pushes water through the block up to the heads .The water in the back of the heads has to go to the frt of the heads to the thermo than out. By the time that happens sometime the coolant turns to steam or sits and creates hot spot in the back of the head.All I did was make an exit for collant to flow out .The water cant cool anything unless it flows through the system. This mod has been done for years most of the chevy/ford manifolds have ports for this .As far as the hoses heating of thw manifold i think will be minimal . Thanks for the props on the install.