Tom was an exceptionally talented writer and his prose often has also literary aesthetics and value.
I guess "beauty is in the eye of the beholder" when it comes to Tom's prose. The first paragraph-length sentence you quote below is ridiculous in my opinion (although very memorable, I'll agree). The sentences about cellular mergers via symbiogenesis is quite good, I agree. I personally found that Tom's writings in the 70s and 80s were much clearer and more professional. Towards the end his writing appeared more and more frenzied and 'stream-of-consciousness' with long passages editorializing on the shortcomings of others' points of view. In my view, if he wanted more people to understand his work, he should have put more effort into refining what he wrote and making it more accessible. All of the above is just my opinion and I totally respect that you and others might see things differently! When it comes to discussing "quality of prose", it really seems just to be a matter of taste. So I'm not suggesting you change anything here, I'm just sharing my thoughts for what they are worth!