Ok so I'm going to jump in on this. First off, glad your happy with your new headlights and it's nice for some people to go through the effort to upgrade the headlights for real HID equipment.
I'm with 00RT on this. You can't say the OEM stuff is at fault. My 2014 ram with the sport headlights (chrome bezels/shrouds) had light fog around the LED turn signals stock, with or without HIDs in the stock projectors. I opened them myself and retrofitted FXR projectors and since have had no fog wats so ever. Going on 2 years now.
another thing to note is that the fully blacked out projector headlights are exactly the same as the chrome versions, only difference is the chrome shroud. Which plays nothing into what your talking about. The only issue is that the black shroud paint will bubble due to heat from the lense beam output or sun being magnified through the lense. This is why they are recalled and why Jeremy at retroshop doesn't paint the inside of the shrouds and leaves them chrome.
Also FWIW the TYC replicas are not the same as stock. The OE has to deal with lots more restrictions and that's why ALL projector lenses are frosted and fresnel finished. This blurrs the beam and takes away brightness/intensity/ cutoff for incoming traffic. TYC uses a clear lense as they are aftermarket replacement which allows slightly more light output and a sharper cutoff. So they are at an advantage only in that aspect.
So basically you bought an overly expensive shotty headlight and threw more money into it to make it perform better. Personally I think the OE projector headlight looks better and none of the aftermarkets come close but that's personally. It wouldn't be that hard to fully seal the headlights... only the vents and the rear cover on the projector versions. A lot of people forget that the aftermarkets quality isn't the same, your headlights look good now... but what about in 2-3 years when the lense discolors or starts peeling or the LEDs die. Only time will tell.
It's cool to see u go through the effort to improve the shotty original quality and your headlights should work well with the morimoto stuff.
Fog lights and HIDs is a Nono. That's a known thing. Retrofit some projectors in there and you'll be amazed. Basically HIDs should only be used with HID optics.