So, we would get the settler in place a turn earlier, but may lose a turn on the library. Actually, given that we've gone AH first, the library is delayed by 2 or 3 turns from that, so I can't see why we wouldn't have a spare turn to build the road.
It makes me think though, if people are going to go to the trouble of making detailed micro plans a fair few turns into the future, then we should put them somewhere easy to find. I'm thinking we create a thread with the first post edited to always contain the current best-guess micro plan. It would make it easier to keep track of things like what we're discussing now, but also make it easier for someone playing the turn to check what they're going to do. If someone else thinks it's a good idea, I'm happy to look after editing it.