Yes.
The “Text” widget was introduced in version 2
The “Choice” widget was introduced in version 3
We’re probably overdue for “version 4” as there are now a number of things that are supported in recent Audacity versions, but not older 1.3.x versions. (such as (get-env) and scratch)
This page by Edgar (“Edgar M. Franke” AKA “edgar-rtf”) is well worth a read through: Audacity and Nyquist
Lol - yes, “dreaded” because of the number of clicks required to select a simple effect, though I believe that the underlying idea of categories is a good one - it just needs to be implemented in a more flexible way. As soon as a user installs the “90 Ladspa plug-in pack” it is a pain to search through a numbered, but otherwise unsorted list.
I think that some sort of Parametric Eq would be a good addition, but as a Nyquist plug-in its usefulness is severely crippled by the lack of both real-time adjustment and “Preview”. It’s most unlikely that real-time processing will ever happen for Nyquist plug-ins, but a Preview feature would be a great boon. (Feel free to add your vote here: Wish List - Preview button for 'process' plug-ins 
)