WolfThomas said:
Thank you. I'm aware of this "continuity" you speak of.
Evidently not, since you follow this with the word...
WolfThomas said:
That is not continuity

Presuming something and putting the pieces together in your head are the opposite of continuity. It was absolutely a continuity error as evidenced by not just me, but several others pointing it out before me in this very thread and many others in other threads on other forums. It is a monstrous continuity error. You can presume and logicise it all you want. I used to work in media editing and am acutely aware of things like this.
If you think I'm being harsh of something you love and you must jump to defend it, please don't. I love it too, I have already said I thought E10 was not only better than any other season finale or even S6 episode. But I AM able to criticise something I care about for these things. The error is blindingly obvious and the simple solution would've been to not have Varys on the boat at the end. They created the issue by putting him there when we the audience had last seen him half a world away that same episode with ZERO explanation or such as to how he managed to come to be there.
His going to Dorne was fine. We see him leaving Mereen in Tyrion's company an episode earlier, we the audience not certain of his destination. Then he appears in Dorne at right time and finds allies for his Dragon Queen. That was brilliant storytelling. That was dramatic and makes us wonder now how Dorne and the Tyrell's factor in to Dany's forthcoming invasion. His reappearance on the boat was clumsy and unnecessary.
You can say "presumably" and "very likely" all you like, glaring continuity fail is still real. There are dozens of pages [https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=varys+teleport] about this online.
There were similar issues in MTVs fantasy show Shannara Chronicles. It, like GoT, is 10 episodes long. In it, the heroes travel from place A to place B over the course of the season, roughly from Episode 2-3 and arriving in Ep9. In that time they have myriad adventures including betrayals, kidnaps, rescues, separation, reuniting, fighting, running, demons, etc, etc. It takes them 6-7 episodes to get from A to B. Then in the last episode, in 5 minutes they get from B back to A again, in the middle of a full pitched battle. It absolutely beggars belief. The show established time and distance between these places, the hazards and pitfalls befalling anyone journeying between them, and suddenly it doesn't matter, our heroes make the journey in 5 minutes. It is a catastrophic continuity failure. It is bad storytelling. It might make for drama to have them appear at the eleventh hour to save the day just when all hope was thought lost, but it was cheap drama and poor storytelling.
The Varys issue isn't a huge screw up. The issue is that there are other stories that are more interesting...I even answered your question that it isn't interesting to see. But in GOOD storytelling, we should see it because of continuity. Teleporting the Ironborn, Varys and Arya everywhere is a poor way to set up next season. Although Arya I would probably let slide because her re-emergence in Westeros was both very dramatic and in keeping with everything we know of her (and at least we had a shot of her declaring she was leaving Braavos).