There is no indication that having one expire will let you book another. It works that way for Genie+, but I believe you had to tap in for Fastpass+. If you are going to be in the park early, you could book something early even if it won't have a long line and tap into it (even if you don't ride it right away and ride it standby later).Another strategy idea. Unsure if this would work.
For example MK...
Book your one tier one LL attraction for whenever and the other two LL can be for anything with a quick return time, so that it expires early. Prefferably something that wouldn't need LL or would have short Stand by waits later.
Then as the low tier LLs expire you should be able to book 1 and even 2 LL at any tier.
Then modify the LL until you find the return time you want.
EDIT: See Post 908 on page 43 for website language that indicates having one expire may let you book another.
Last edited: