I know this will ruffle a good deal of petticoats, but... I don't think player races should get darkvision at all.
There! I said it! Whew... feels good.
I don't want to hate on races that get it, just... it always bugs me thematically. They hold the potential for changing the dynamic of certain campaign themes and it creates this need in some groups to have at least one character with it, or all with it.
And I don't like that. People should be able to play what races they want, without the need to have one person be able to see in the dark, or to expel all that do not, so there are no torches.
There are certainly good cool stories for things like that. Just... It isn't my cup of tea. What is more, unless you have a great understanding of how it looks, note, Humans just naturally do not, (we don't have the ability so the concept isn't as natural) then you have some players who think it is near infinite, or as good as eye-sight in daylight.
I am glad they got rid of the varying degrees like low-light. I hope they remove darkvision altogether one day. At least for player races.