Changing out a racial ability for a player

[Anlashok]

Player in my campaign wants to play a Nezumi (OA) for whatever reason (maybe scent?), dunno why, the race looks kind of awful to me.

Anyways one of the race's features is being immune to shadowlands taint and having a really weird fake-natural attack and given that the campaign I'm running isn't using shadowlands or taint mechanics and that their unarmed mechanic is kind of odd I was wondering if anyone had any advice on how to replace those for a general campaign.

[Troacctid]

There's a Pathfinder version that might work better. http://www.d20pfsrd.com/races/other-races/featured-races/arg-ratfolk

[Anlashok]

There's a Pathfinder version that might work better. http://www.d20pfsrd.com/races/other-races/featured-races/arg-ratfolk

Yeah I've seen those, they're pretty awesome but it's a no-sale for this player, he's looking for a medium sized race and doesn't want a strength penalty. Might tinker with that base though.