It's sad that you can do better research by yourself than they do as a team lol. You easily figured out every grenades strengths and weaknesses and even gave detailed explanations as to why they are good or bad.
Meanwhile bungie simply justifies their nerfs with some graph that could easily be skewed by a number of things, rather than actually testing it the way you did.
Swarms are still trash and they significantly weakened the other two, which were both grenades that required precise aiming to kill.
Trips and throwing knives are your only counters to shoulder charging Titans, shotgunners, and warlocks rushing in for a melee. It's now a lot harder to counter these things unless you run a shotty yourself.
There are often qualitative factors that a graph cannot interpret, which is why I try and give strengths and weaknesses in addition the damage numbers. Thanks for your comment :)