I just moved up from a 2017 SFS to 2019 SF. While my 2019 still flashes the lights on Bluelink remote start, at least the lights don't seem as annoyingly bright as they did on my 2017. What really have noticed is that Bluelink remote start is much faster on the 2019 than on the 2017. Presumably it has a better LTE chipset/modem, but there are times when using the app on my iPhone where I haven't even had time to put my phone back in my pocket before the successful start alert comes in.Smart would have been to have the lights just come on, not flash. I just got a new 2019 Santa Fe and they are still doing it. First time I remote started I called the dealer and all I got back was "we know, we know, trust us we know". They were expecting a firmware update to remove it, but last I heard they were still waiting.
On another note I had just renewed my Bluelink subscription for the 2017 SFS before trading it in. The 2019 of course comes with three years complementary. But I did receive a full refund on the remaining time on my 2017, which was good.