I like your nomenclature ‘goblinkin’ much more than ‘goblinoid’.
Do you do the same thing with ‘humankin’ for ‘humanoid’.
You need to define "significant".Isn't having a natural weapon that does significant damage better than not having a natural weapon that does significant damage? I wouldn't consider that a ribbon ability.
I am regularly underwhelmed by these. I think it's because the power level of the features of the PHB races is so minimal that they don't have a lot of design room to make bold choices or features that matter.
I wish a STR/CON dwarf fighter played significantly differently than a STR/CON half-orc fighter than a STR/CON Minotaur fighter - even at high levels.
One of the issues i have with both the minotaur and the centaur is that they're more pigeonholed into a specific build than other races. The centaur has 2 main abilities that revolve around melee and the minotaur has 3. If you want to make a minotaur sorcerer, for example, you're essentially throwing most of the your racial abilities out the window, and that's a shame because they could have chosen to create abilities that were a little more versatile. Ironically, i remember how this was the main criticism of the 4e minotaur, who had (iirc) the only racial ability in the game that required you to run a melee build in order to fully utilize. Either the centaur or the minotaur could keep the natural weapons as a cute, but generally useless, ribbon while then having mobility or broadly applicable damage features.
ORIf you want to make a minotaur sorcerer, for example, you're essentially throwing most of the your racial abilities out the window, and that's a shame because they could have chosen to create abilities that were a little more versatile.
Either the centaur or the minotaur could keep the natural weapons as a cute, but generally useless, ribbon while then having mobility or broadly applicable damage features.
OR
They could have made natural weapons something fightery minotaurs could actually use AND given it some sorcerous abilities that complements spellchucking minotaurs.
As long as the fightery minos can't also use their mystical power, and the spellchucker mino can't use their horns, it's all good.
Too many people forget that for a wizard or sorcerer Horns can be damn good and still be useless. And that you can heap on extra magic power onto a Barbarian with zero utility.
If this ends up actually enabling gishes all the better