I guess you should decide if you have a problem before looking for a solution. For example, I've never had any engine heat problems, let alone overheating, so my bonnet sound-insulation is certainly still in place, as is the undertray.
May have something to do with my 'Olive' being a Rover (auto box) though, which means that under normal conditions the engine will probably be revving much less than when driving in a somewhat 'spirited' fashion with a manual box? Hard to say. I imagine the weight of the right foot may have something to do with it too! A motor being asked to work hard and run at higher rpm, is likely to generate more heat, I think.