Having the option to customize the routes you want to do where your able to set up a breakpoint in a zone to jump to the next one and blacklist quests.
Generally speaking right before an expansion hits or a major patch people come up with new routes that usually involve unlocking dalaran hearthstones to double-hearth unlock warmode/riding etc ,but not going further in the Legion chain. Or do half a zone and come back later afterwards to reach level milestones before unlocking a new zone.
Also being able to share those with import/export codes through weakauras or directly from wago.io whould be great.

So I got question regarding this added feature ( I got the latest version of apr )... and my question is how to access individual quests to blacklist and/or whitelist them ?
As it seems right now for me I can only add custom paths and it only allows you to pick zones/parts of a zone.

This is being discussed, but is not going to be feasible for V3, but it may be looked at for V4 in the future. I am leaving this open for now to continue the discussion and tracking of it.