Tiefling horns are customisable.
> Can we finally choose a true No Horns ? (Not vaguely-cut horns ?)
> And No Tail ?
So basically a human with a more exotic paintjob?
Yes, -ish. I don't like Tieflings that are mass-produced according to strict specifications. Being exposed to the magic of the planes (or even just the plane of the Nine Hells, or even just having devil ancestors) should result in a wide range of possible "mutations" / features. Weird eyes, 6th little fingers, black nails, weird teeth, horns, tails, weird ears, weird skin colour, ... or any mix of any subset.
I'm not expecting Larian to add options for 6th finger, nail colour, etc ... but the option to have no horn or no tail is just a matter of including these options in the list of horn styles and ... tail style.