Not sure your first point is right
When Jose did Citeh in his first game against them,
Chelsky immediately learnt the lesson in their game.
They were able to push Spurs into the final third
for much of the game,but left a couple of players
back near halfway in anticipation of Kane and Son
doing to them what they did to Citeh.
So it can be done (pressure maintained in attack,
risk reduced of the counter) ,.
"Unless of course you think you have enough data about the causes of the two goals
you have conceded to warrant a change to stop further similar goals, which I think is going to be rare"
I have not seen the match summary, but if like the Spurs
2-3 win last season, I will be able to easily see what
the causes (and possible corrective changes) may have been.