Infravision vs Darkvision?

Hello! Aspring XWN GM here, and in the early pre-planning for a campaign one of my players expressed feelings about how some demi-humans in WWN get "you can see in the dark" instead of his preferred infravision and he's asked if I would consider changing it. I'll have to poll the other players for thier thoughts as well, obviously, but I feel like I need to understand the implications of a change like this before I can make an opinion of my own.

I've been doing a little poking around for thoughts on what meaningful differences there are between the two and I've come up with a mixed bag. Personally, it sounds to me like adjudicating infravision might be fiddly enough to make the ability about useless, but I can also see the point behind arguments for darkvision being too powerful, especially when there aren't the limitations that 5e imposes (RAW, anyway - I know they're often not followed, including by me)... but on the other hand, spending your free chargen focus pick on an origin should net you something pretty worthwhile, right?

TL;DR: is old school infravision worth patching into WWN if a player wants it?