speech processor setting (FRS dev only pse)

Somewhere  I recall reading the speech processor settings (in SmartSDR) being Normal, DX and DX+, equate to 0,1,2 internally. And, in fact, transmitter status shows this
"speech_processor_enable=1 speech_processor_level=2"

There are places in SmartSDR where tristate controls (those controls having 3 possible states) are explicitly checked in Flexlib for only those valid values, presumably 0, 1, 2, in this case.

However, this is not the case and the valid values for speech processor settings are 0-100 and, if negative set to zero and if > 100 set to 100.

My question is this:

Should the logic in anyone's bridge logic between a UI and the radio check solely for values, 0-2  OR do values greater than 2 have significant value? In other words, is there a use case for a value of 3 or 50 or 100?