Alternatively, the total FP pool could increase to accommodate the new system, leaving the existing system more or less as-is but greatly increasing standby lines. That would also account for the sudden need for strict FP enforcement, if they're anticipating the majority of each headliner ride's capacity to be reserved in advance.
I think the system as a whole sounds very promising but I'm reserving judgment based on three factors -
1) Cost. If the $80pp rumor that Jim Hill (I think... maybe it was a different fan/rumor site) posted is accurate we'll be priced out.
2) Reliability. Functional technology doesn't seem to be Disney's strongest suit of late, not online and not in the parks. This could be great, or it could be a buggy interface for pre-reserving rides that may or may not be operational for enough of the park day to accommodate everyone who made those reservations.
3) Timeframe. I'd be happy to book my ride FPs when I do online check-in, but there's no way I'm booking them months in advance the way we do ADRs. Being shut-out of favorite restaurants on short-notice trips is bad enough, I don't want to be shut-out of favorite rides too!