I’m not sure what you mean by closest. It is the most recently booked LL that you would need to use to book another. Perhaps that is what you meant.
Edit: You would also have the 2 hour option too. I was referring only to the most recently booked option.
Update from Len on LL forecasting posted on another site:
We’re in the final stages of testing that functionality for the plans - it should be out in a couple of weeks at the latest. There are no known issues right now.
The big difficulty was in figuring out how to include getting the pre-arrival “Get a Genie+ for Attraction X” steps into the plan, and choosing those efficiently.
Thanks!
This sounds very familiar! 
In the meantime, my quick&dirty approach is to use thrilldata for same day last week.
Update from Len on another site:
We’ve finished the coding updates for our touring plan optimizer for G+, too. We’re waiting for Apple and Google to approve the app changes. Once those are out, we’ll tell you the best G+ reservations to get, and when, for your specific date and list of attractions.
This is exciting!! I love making touring plans! Even if it’s for a wishful thinking trip.
Sharing here also,
Lines app update late Monday/early Tuesday.
The site is updated with the new Genie+ support. App updates are going out now, and might take (Apple says) up to 24 hours to complete.
Thanks for posting these!
I have tried following these instructions with both a new and “template” TP and it doesn’t seem to be working. When I optimize, it doesn’t add the suggested LLs and when I evaluate with a manually added one, it says it can’t find a forecasted time. Has it worked for anyone?
Having trouble optimizing at all
Feature request: ability to forecast return times for manually added LL’s.
Ie you add an LL, and instead of inputting return time, there is a button called ‘Forecast’, you hit it, and it populates return time automatically.
I had this issue too and submitted a ticket with screenshots. The LL part is not working for me.
It looks like we’re missing some LL data. David is working on it now. ETA is less than an hour, I think.
Go ahead and open tickets if it’s anything other than that. Thanks!
I’m told we’ve regenerated the LL data. Please try to re-optimize plans, if you’ve got them.
Hmmmm, it’s still not working for me. I deleted and redownloaded the app. And it shows that I have G+ but the system is not adding in lightning lane suggestions for me.
When I manually add in an LL for PPF, I get this.
Ah, thanks for sending the screencap with that date. Looking at it now. I think we just loaded December and are on to January now.
