Obviously they know more than they are letting on, and are just not going to set expectations running wild. If problems come up with the patch(es) prior to being able to implement this, the ROI and resources to continue working on anything more than bugs and problems could dry up. Just speculation, I'm not going to debate timetables and resources like I'm up in their JIRA assigning tickets or managing burndown charts.
To me, they're hedging against something not working out and not being able to add it - I think they'd know whether or not they could add it too. I would be impressed if it returned, but I'm just as impressed they've mentioned it in this latest message because they're doing little to curb the high expectations the community has when any hope of something getting done is presented as a possibility.
I don't see fantasy drafts plausibly being patched in because they haven't mentioned it that I've seen, and the extent of editing possible goes back to my first point about resourcing speculation.
In the end, obviously they don't see the need to get out in front of it and say it won't happen so people can move on/accept the product features that shipped (bug fix patches pending), or they would be doing so.