You may want to consider leaving some way for air to enter and water to drain without exposing it to more water entry as it dries over the winter.  I was going to say that hopefully you live in a climate where freezing wouldn't be a problem, but I see you live in Minnesota.  I wonder if there is some way you can blast a bunch of warm air through the bottom of the spoiler before winter comes,  ... next week 🙃.  On the other hand, if a little condensate and water drops freeze it isn't likely to hurt the wiring or lights like it can with plumbing.

I've had the roof seal tape on three sides of the spoiler, leaving the bottom open, for about a year with some pretty windy storms and have experienced no leakage.  It could be dumb luck, or maybe I actually sealed the spoiler up successfully.  Only r-Pod goddess knows for sure. 😎

The factory caulks or attempts to caulk the spoiler all the way around.  But when I sealed ours with Eternabond, I applied it only to the top and sides.  As for windows, our leak was definitely not the window, though windows can leak.  The proper set for a window is butyl tape all the way around.  If done correctly, the window should be leak free "forever."  That would be the correct caulk for the spoiler, too, if the spoiler could be uniformly snugged down to the roof.  But it can't be.  

Here's my take on the spoiler,  spoiler is black, that's the worst possible color, baking in 100 plus temps something has to pop. That's why I made my own, no caulking needed, rubber gasket, weeping holes at the bottom and a couple vent on either end.

One would be sealing the spoiler all the way around. Seems silly to me to caulk along the bottom of the spoiler. Let it weep and seal the top and sides as best you can.

The other may be mistaking rear window leak or condensation. It's really pretty amazing how much condensation can form on rear window and look like a leak! Again, the rear window caulking should be concentrated on top and sides. Gravity works!

Sometimes, I think we create problems where none existed.

Just my 2 pennies on the subject.

fred

Go about 1/3 the way down the page, and you will see what someone did with a Winnebago Winnie Drop 1780 (rough equivalent to an R-pod 178). They claim about a 20% improvement in fuel economy.

As for a different spoiler material on the newer Pods, I haven't a clue as I only saw my neighbor's new Pod for few minutes before he hauled it away for storage and I was admiring other features.  I still don't understand why they didn't put a simple 3 light fixture on the back on the new Pods.  Less leak risk and I really doubt the spoiler does much with wind turbulence behind the trailer.

If I were to go through the recall again, I think I'd opt for doing it myself with after market materials and figure out a way to fish the wire from the side to the center of the back roof where I could bed a small light fixture in some sort of bedding compound like 3M 5200 caulk.  I'd look for a fixture that could have the lights changed without removing the fixture.  

The only problem I foresee is that it's going to be a heck of a job to ever take the spoiler off if I need to replace the LED lights since all the upper screws are nicely covered.  Hopefully, in the unlikely event that happens, I can get to the lights from below where there is no tape.