I have experienced what you are referring too, Overkill, but in all honesty, I am not 100% happy with the hood mounted nozzles on my Ram, especially, and mostly, at Hwy speed.
They have never frozen up, yet, but trying to spray/use them while traveling at hwy speeds of 100-120 km/h, the majority of the fluid barely reaches the windshield.
The ones you are talking about are the best in that regard, but if they are frozen, then they are useless as you have alluded too.
The 09 Sierra I owned, with the not defunct/recalled heated reservoir certainly worked the best but unfortunately, that seems like that is no longer an option on any vehicle that I'll ever own?
All that aside, and although it sounds like you have no control over what goes in it, I have the Costco -45 wiper fluid to be the best out there. My wife's new Impala has the wiper fluid right in the wipers and she hasn't mentioned anything about freeze up during the cold spell we just got over.