I've said it before on here and will say it again, there is no reason to play Human if there is no Variant Human. One would know this if they've made a few characters. Regardless of what you want your character to be able to do: swing a sword, shoot a bow, cast a spell, there are multiple races that will do it better. And, to boot, those races will have other cool racial abilities to use in addition. Those extra +1s are mechanically meaningless within the context of the game.
I disagree. maybe on paper... before I played my Human Ranger, it looks like you are right. But in practice, 16str 16Dex 10con 12int 14wis 9cha.... works VERY well in this game... granted this stat spread wont be so nice once they actually add higher levels... but the Toughness feat provides as much Hp as +4 con, so you can always just subsidize it later when you start to fall behind in health
That build sounds awful to me - why would a ranger value INT higher than CON? Why would it even value INT at all? I also don't see why you'd want 16 STR and 16 DEX on the same character - there's just no point in investing so heavily into both stats. The only real point to using STR as an attack stat is if you intend to use medium/heavy armor (if you aren't using medium/heavy armor then DEX gives all the attack/damage bonuses that STR does on finesse weapons + a bunch of other stuff on top of it, so spending twice as many points to get pretty much the same outcome seems incredibly wasteful to me). I'd much rather just forget about STR and INT and focus on DEX and CON instead (or alternatively, drop DEX down to 14 and keep STR if you intend to use medium armor).
I would say the biggest flaw with humans right now is that the lowest their stats can go is 9 instead of 8. On paper they look like they get a lot of stat bonuses, but in practice a lot of those bonuses are wasted because there's no point to having 9 in a stat instead of 8, but those stats are also still just not valuable enough to be worth spending points on (unless you have nothing else you actually care about to spend points on, but in those cases you may as well pick a different race to get extra bonuses like the +movement distance and darkvision from a half wood elf)..