Before the rollout there was a popular expectation that guests would be able to pre-book in times close to one another earlier in the day (at least for resort guests). The idea was that crisscrossing a park would be reduced. As it stands today this is very difficult to do before noon. It's great to have flexibility to pick times, but when realistic groupings are early afternoon to early evening (depending on popularity of the tier 1), tradeoffs are created as hours tick by before able to book new attractions (when first booked a the afternoon).
G+ put a burden on same day guests to work through the system and continue refreshing, and success stories for new multi LL have often included similar stories about modifying and refreshing. We've been checking every few hours to see what pops up for booked days 9 and 14 day, and we'll continue to do so. I suspect eventually we'll find better times to fit into our schedule but its going to be more burdensome, for us, than just doing it same day with G+. Sounds like there will still be much modifying and refreshing so I'm not imagining being on my phone less during the trip. More pre-trip work without significantly reducing day-of burden is, imo, a net loss.
What I'm talking about might be easier to see here, for we what we have for HS on August 5.:
View attachment 804903
First I note thatbwe have these because my kids have different HS interests and that's why we end up with +3 reservations. Anyway, 9 days out the best we could do with Slinky was 5:55. Our choices were then to either group things closer together after 2 for a plan to make more sense, but the tradeoff would be not starting to use reservations earlier (here Runaway Railway, Swirling Saucers, ToT) and booking better replacements later. Can this be cleaned up? Probably, but it's going to be a real pain.