It's nice to see if someone is begginner, if he have some experience (expert) or if he is good or excellent (no difference here, only master).
I still adapt to some players depending to their elo. If someone do a double finesse on myself, I will try to find another interpretation for the clue (early 5 save?) if the player is only expert. Which just give better results.
But if you want lots of ranking, you should play at 2. It's easier to gain elo.
And personnally I don't care much about abandonning or finishing now. It's like a challenge which are either successfull or not. And if it's not, the challenge is over.