I asked the question almost 10 years ago and walked away under the assumption that the full faith and credit clause does not apply here. States are free to explicitly ignore drivers license from other states for any reason, and the only reason they don’t is because each state has a statute on the books that specifically grants national (and in another statute, international) reciprocity. IANACS, but that’s been my understanding ever since that thread. So I agree with Max here, the statute appears constitutional.
Given that, it seems so narrowly worded as to be not much more than virtue signaling (shocking for FL, I know). As pointed out above, Delaware’s DO license was only ever intended for use within Delaware, and Connecticut’s FAQ says:
The Connecticut drive-only license may be honored in other states. However, you should check with the other state before driving in it.
So Connecticut never had the expectation that this would be a national license either.
If either state wanted to get around the FL ban on this type of license, they could simply re-word the language in their own statutes to remove the part about undocumented individuals. Simply open it up to anyone who chooses not to present proof of residency, whether they’re actually undocumented or not, and the FL statute is moot. Is that why these two licenses are the only one on the blacklist at this point?