(Related to this question)
I am working on selecting all the available races/subraces for my 5th Edition campaign. Because I don't like the way that WoTC has laid out the race/subrace info, I'm creating a completely new listing for each subrace that lists all the traits they possess. For example, rather than listing one set of traits for dwarves and then listing the additional traits that Hill Dwarves get, I'm creating a single entry for Hil Dwarves that includes all of their relevant info.
In the Sword Coast Adventurers Guide, there is a tiefling variant called the Feral Tiefling. Currently, the only change in this variant from the Player's Handbook Tiefling is to change it's ability score bonuses. I'd like to create more variance by also trading it's Infernal Legacy trait for something else. However, I'm not sure what the "value" of Infernal legacy is.
Looking at all the races and subraces, there is only one that trades away spell-like abilities. It's the Winged Tiefling also from the Sword Coast Adventurers Guide. They replace Infernal Legacy with the Winged trait, which is an extremely strong trait.
How strong is Infernal Legacy, and what traits are a good equivalent for it? I am thinking of adding a claw attack similar to that of the Aarakocra, but that doesn't seem to be as powerful as Infernal Legacy.
A good answer would refer to either the users own experience with homebrewing races in 5th Edition or some kind information from the game designers. I have consulted the custom race information in the DMG, but it doesn't give any kind of equivalency between racial traits or give more than the vaguest advice about "balancing" races.