I actually like the 5e Tiefling better then the previous Tieflings, including the PS and 4e Tieflongs.
The fluff is closer to the 4e Tiefling, but mechanically its distinctly 5e in Mechanics, but with obvious influences from previous incarnations of Tiefling.
Still all the focus has been on the fluff, but mechanically is the Tiefling mechanically competive especially in comhat, with the other races we've seen?
Really the Tiefling only has two distinctive traits, Hellish Resistance, which grants fire resistance, which is a major boon against enemies which deal fire damage and possibly in hot climates.
The other is Infernal Legacy which grants Thaumaturgy right away, and hellish rebuke and darkness later.
The Tiefling also gets Darkvision, +1 Intelligence and +2 Charisma, and knows Infernal.
The ability bonus is great for caster classes/subclasses, but offer no Strength/Dexterity boost for fighting classes.
At Level 1 the Tiefling is at a disadvantage in combat. Hellish resistance is great against fire dealing enemies, but against everyone else she has no other tricks as Thaumaturgy is not a combat cantrip, it does no damage and its has no combat use.
At higher levels Infernal Legacy gets better, Hellish Rebuke is no doubt a damaging spell, and darkness has its uses too.
So that's the equivalant of 2 second level spells.
Outside of combat the Tiefling is better, Hellish Resistance is useful in hot areas and against fiery traps, Thaumaturgy has a variety of uses out of combat, Darkvision is useful for scouting, and Darkness is useful for stealth and can be used creatively.
Compare that with the Halflings lucky trait or the Elvish weapon training, or Dwarvish weapon training, or High Elf cantrips of say firebolt. All very useful at level one.
So does anyone else think Tieflings are mechanically weak in combat at 1st level?