One thing to consider...
Since Smuggler's Run opened, and they made all other rides (except Star Tours) tier one, look what we've seen for wait times across all the rides. At virtual all hours of the day, all rides have very similar wait times, including Smuggler's Run. SDD trends to be 5-10 minutes more, but still in the same ball park. I'd maintain, that Disney has successfully spread the crowds pretty evenly across all the rides in the park, and actually makes the case that it's FP+ that really causes long wait times.
If Disney looks at the data that way, they could well decide that FP+ isn't needed for Smuggler's Run, Rise of the Resistance, or Mickey and Minnie's Runaway Railcar at all, and just keep all the other rides as tier 1.
Just a thought.
Steve