I am glad that Trek abandoned the different badges for other ships. I never did care for it. I am glad that the symbol for the Enterprise was used for all of Starfleet.
At least as far as TOS goes, I must disagree. The patches for both the Constellation
are both interesting and visually striking... in fact, both are more interesting than the delta... and they represent the concept that each of the 12 starships was indeed something special, worthy of it's own symbol. If only Bob Justman hadn't ruined that thought for me....