Every FP I've used in my few trips this year so far have put me on the ride/attraction very quick with minimal wait time. I'm generally on in around 5 min.
And if I get through the ride quickly, just do what everyone did before MagicBands and FP+, go ride other rides or enjoy the park. The FP+ hasn't changed what people do in between ride times than what everyone use to do with paper FP's