I always thought of doing some kind of classification but never gave enough time on doing the same research as you did. It looks pretty impressive and also the chosen tokens/coins correctly belongs to the category you've mentioned. As going ahead project should follow the security guidelines, there's a high chance that security tokens will boom in next couple of years. I am holding quite good amount of POLY and thinking of buying MOBU too after it starts trading on any exchange.
Yes I too started by categorizing at the top level and then slowly started looking into the whitepaper and technologies of the project. Made a list of similarities between different tokens/coins and put them in the category most suited as per there functionality. I am still researching more on the front of real life use cases of blockchain technology and will put some coins under that too.