Mistwell
Crusty Old Meatwad
I have turned Darkvision into Low-Light Vision (see in dim light as in bright light) and Superior Darkvision into Darkvision for my campaigns. You cannot read without Light as well. This has made light much more of a factor and given that I use Roll20 for displaying maps with dynamic lighting has made for more immersive and exciting gameplay.
I think this is a good idea. Though I'd probably switch a few races to either 30' low light instead of 60' (and probably call that infravision, so its heat vision instead of black and white) and give them a minor ability, for some variation.
For example, I'd give dwarves 60' darkvision (low-light black and white vision) while I'd give elves 30' infravision (low-light heat vision) along with advantage on detecting secret doors, and gnomes 30' darkvision (low-light black and white) along with advantage on detecting traps.