I've had both the 2016 and the 2017 touring Coupe Accords that use these lights. While they are nice and bright at night and have much better reach and width than just about any other headlight I have driven with they are very poorly constructed. To the all plastic mounting mechanism with no heatsinking on the main LED's, to the LED DRL that burns out very quickly (knock on wood mine haven't burned out yet), to the extremely poor glare control, to the poorly designed auto highbeam system that will flash every car that drives at your 10-11 and 1-2o-clock position it is clear that Honda did a horrible job on these lights and is ripping customers off for the price you have to pay for them.
So what level of heat-sinking should they have used and can you present us your thermal data (with the LED data sheet) that clearly shows the heat sinking is inadequate?
That it is all plastic is really not an issue. It is guaranteed many of these units have spent a ton of time in accelerated life testing shaking away. Screws loosen too. Metal is not a panacea, but it is heavy, harder to form into complex shapes, and could needlessly increase cost.
w.r.t. the auto high beam, that is a separate piece of hardware/firmware.
Glare control? Odds are they will meet the relevant specifications. Objectively are they bad? I can't say I have noticed Accords being worse than others and usually the worst glare I encounter is either from behind and/or approaching on hills, and that can be said of other LED / HID systems. Until we lose the love affair with blue rich (high perceived glare) spectrums, that is probably going to remain the case.
