I must admit that, around 3.30am my eyes may have closed briefly in the middle of episode eight. Woke up to Kathryn walking into a room in the world’s most magnificent frock, and Scott taking her hand and sinking to his knees in front of her. Assumed I must have missed a bit. 
Definitely (ooh! Look at me with the Line of Duty reference!) had the impression they were trying to shove three episodes worth of material into the last one. So it may be that this worshipping/proposal (?) scene was drastically cut, to the point it made no sense to viewers.
I’d imagine Cayden would have spent half his life, growing up, at second, third and fourth homes in the wilds/countryside all over the place. And even if he hadn’t I can completely understand him wanting some peace and quiet away from all the people.
As Zebra says if there IS a series 2, and it is just Katherine being powerful in excellent clothes, the Mexican woman doing similar in Mexico, but no real message - well, I wouldn't hate it.
Indeed!