Yet they skip Sansa/Arya reaction to Jons parentage...
As others have pointed out, I think its based on their reaction not meaning much to the overall story. their actions will mean much more (eg Sansa basically LF'ing the truth).
Arya it wont affect much cos Arya has loved Jon no matter what, and basically shes more interested in getting Cersei than anything else now.
It would have been cool, dont get me wrong. but I can get why they missed out on that. Moreso, than missing out on a goodbye between Jon and Ghost, as at least for that, Jon has pretty much given the direwolf away.
All they really need is an editor to ask "would this be stupid"? Shouldn't be hard to find someone whom they bounce off their writing.
Still I enjoy watching the show and since they have progressed past the books, I don't know what happens, but the lack of quality in writing is annoyingly bad.
What if they did though? Stupid to one person doesnt mean its stupid to another.
Or what if they had discussed it, and decided whilst its stupid, its better than alternatives which would be a strain on cast / writing / budget. etc.
I do overall think the last 4 seasons put more emphasis on battles / set pieces than dialogue / plotting. But that was to be expected. They focus on one aspect more than the other. The first 4 had watchers at the wall and battle of blackwater that I can think of top of my head as the big set pieces which looked to have big budget required.
Last 4 required it for, Hardhome, dance of dragons, winds of winter, battle of bastards, beyond the wall, spoils of war, dragon and wolf, long night and of course next episode.