Sub-species Are Bugged?

Has anyone else done some testing with how the subspecies worked and noticed it seems bugged?

​

I was doing some testing in single player using the /getattr commands to see how the different sub-species affect dinos to myth-bust some things I've seen people say. Unless I am missing something big, it seems that only the speed stat changes when picking a +/- speed and defense sub species. I use /getattr to check every stat I could including armor, maxhealth, combatweight, and I cannot find anyway that +/- defense affects dinos. Speed +/- subspecies do affect the movementspeedmultiplier attribute as they should, so it seems like there is no downside to picking speed and no upside to picking defense.

​

I'm still figuring out thee best ways to test this kind of stuff so feedback is appreciated if I'm missing something obvious